One Call API 3.0 - OpenWeather

Product concept

Get essential weather data, short-term and long-term forecasts and aggregated historical weather data is easy with our OpenWeather One Call API 3.0. This product designed to ensure easy migration from the Dark Sky API.

One Call API 3.0 contains 5 endpoints and provides access to various data:

Current weather and forecasts:
- minute forecast for 1 hour
- hourly forecast for 48 hours
- daily forecast for 8 days
and government weather alerts
Weather data for any timestamp for 46+ years historical archive and 4 days ahead forecast
Daily aggregation of weather data for 46+ years archive and 1.5 years ahead forecast
Weather overview with a human-readable weather summary for today and tomorrow's forecast, utilizing OpenWeather AI technologies.
AI Weather Assistant for retrieving weather data and weather-related advice in a human-readable and friendly format.

One Call API 3.0 is based on the proprietary OpenWeather Model and is updated every 10 minutes. Thus, in order to receive the most accurate and up-to-date weather data, we recommend you request One Call API 3.0 every 10 minutes.

Current and forecasts weather data

To get access to current weather, minute forecast for 1 hour, hourly forecast for 48 hours, daily forecast for 8 days and government weather alerts, please use this section of the documentation.

If you are interested in other functionality on One Call API 3.0, please check Product concept to follow the right section.

How to make an API call

API call

https://api.openweathermap.org/data/3.0/onecall?lat={lat}&lon={lon}&exclude={part}&appid={API key}

Parameters
`lat`	required	Latitude, decimal (-90; 90). If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
`lon`	required	Longitude, decimal (-180; 180). If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
`appid`	required	Your unique API key (you can always find it on your account page under the "API key" tab)
`exclude`	optional	By using this parameter you can exclude some parts of the weather data from the API response. It should be a comma-delimited list (without spaces). Available values: `current` `minutely` `hourly` `daily` `alerts`
`units`	optional	Units of measurement. `standard`, `metric` and `imperial` units are available. If you do not use the `units` parameter, `standard` units will be applied by default. Learn more
`lang`	optional	You can use the `lang` parameter to get the output in your language. Learn more

Example of API call

If you you want to exclude some parts of the weather data from the API response please add exclude parameter to the API call like in the example below:

https://api.openweathermap.org/data/3.0/onecall?lat=33.44&lon=-94.04&exclude=hourly,daily&appid={API key}

If you do not need to exclude any of the weather data from the API response please use API call like in the example below:

https://api.openweathermap.org/data/3.0/onecall?lat=33.44&lon=-94.04&appid={API key}

Example of API response

Example of API response

                
{
   "lat":33.44,
   "lon":-94.04,
   "timezone":"America/Chicago",
   "timezone_offset":-18000,
   "current":{
      "dt":1684929490,
      "sunrise":1684926645,
      "sunset":1684977332,
      "temp":292.55,
      "feels_like":292.87,
      "pressure":1014,
      "humidity":89,
      "dew_point":290.69,
      "uvi":0.16,
      "clouds":53,
      "visibility":10000,
      "wind_speed":3.13,
      "wind_deg":93,
      "wind_gust":6.71,
      "weather":[
         {
            "id":803,
            "main":"Clouds",
            "description":"broken clouds",
            "icon":"04d"
         }
      ]
   },
   "minutely":[
      {
         "dt":1684929540,
         "precipitation":0
      },
      ...
   ],
   "hourly":[
      {
         "dt":1684926000,
         "temp":292.01,
         "feels_like":292.33,
         "pressure":1014,
         "humidity":91,
         "dew_point":290.51,
         "uvi":0,
         "clouds":54,
         "visibility":10000,
         "wind_speed":2.58,
         "wind_deg":86,
         "wind_gust":5.88,
         "weather":[
            {
               "id":803,
               "main":"Clouds",
               "description":"broken clouds",
               "icon":"04n"
            }
         ],
         "pop":0.15
      },
      ...
   ],
   "daily":[
      {
         "dt":1684951200,
         "sunrise":1684926645,
         "sunset":1684977332,
         "moonrise":1684941060,
         "moonset":1684905480,
         "moon_phase":0.16,
         "summary":"Expect a day of partly cloudy with rain",
         "temp":{
            "day":299.03,
            "min":290.69,
            "max":300.35,
            "night":291.45,
            "eve":297.51,
            "morn":292.55
         },
         "feels_like":{
            "day":299.21,
            "night":291.37,
            "eve":297.86,
            "morn":292.87
         },
         "pressure":1016,
         "humidity":59,
         "dew_point":290.48,
         "wind_speed":3.98,
         "wind_deg":76,
         "wind_gust":8.92,
         "weather":[
            {
               "id":500,
               "main":"Rain",
               "description":"light rain",
               "icon":"10d"
            }
         ],
         "clouds":92,
         "pop":0.47,
         "rain":0.15,
         "uvi":9.23
      },
      ...
   ],
    "alerts": [
    {
      "sender_name": "NWS Philadelphia - Mount Holly (New Jersey, Delaware, Southeastern Pennsylvania)",
      "event": "Small Craft Advisory",
      "start": 1684952747,
      "end": 1684988747,
      "description": "...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 5 PM THIS\nAFTERNOON TO 3 AM EST FRIDAY...\n* WHAT...North winds 15 to 20 kt with gusts up to 25 kt and seas\n3 to 5 ft expected.\n* WHERE...Coastal waters from Little Egg Inlet to Great Egg\nInlet NJ out 20 nm, Coastal waters from Great Egg Inlet to\nCape May NJ out 20 nm and Coastal waters from Manasquan Inlet\nto Little Egg Inlet NJ out 20 nm.\n* WHEN...From 5 PM this afternoon to 3 AM EST Friday.\n* IMPACTS...Conditions will be hazardous to small craft.",
      "tags": [

      ]
    },
    ...
  ]

Fields in API response

If you do not see some of the parameters in your API response it means that these weather phenomena are just not happened for the time of measurement for the city or location chosen. Only really measured or calculated data is displayed in API response.

lat Latitude of the location, decimal (−90; 90)
lon Longitude of the location, decimal (-180; 180)
timezone Timezone name for the requested location
timezone_offset Shift in seconds from UTC
current Current weather data API response
- current.dt Current time, Unix, UTC
- current.sunrise Sunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
- current.sunset Sunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
- current.temp Temperature. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- current.feels_like Temperature. This temperature parameter accounts for the human perception of weather. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- current.pressure Atmospheric pressure on the sea level, hPa
- current.humidity Humidity, %
- current.dew_point Atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- current.clouds Cloudiness, %
- current.uvi Current UV index
- current.visibility Average visibility, metres. The maximum value of the visibility is 10km
- current.wind_speed Wind speed. Wind speed. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- current.wind_gust (where available) Wind gust. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- current.wind_deg Wind direction, degrees (meteorological)
- current.rain
  - current.rain.1h (where available) Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter
- current.snow
  - current.snow.1h (where available) Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter
- current.weather
  - current.weather.id Weather condition id
  - current.weather.main Group of weather parameters (Rain, Snow, Clouds etc.)
  - current.weather.description Weather condition within the group (full list of weather conditions). Get the output in your language
  - current.weather.icon Weather icon id. How to get icons
minutely Minute forecast weather data API response
- minutely.dt Time of the forecasted data, unix, UTC
- minutely.precipitation Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter
hourly Hourly forecast weather data API response
- hourly.dt Time of the forecasted data, Unix, UTC
- hourly.temp Temperature. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- hourly.feels_like Temperature. This accounts for the human perception of weather. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- hourly.pressure Atmospheric pressure on the sea level, hPa
- hourly.humidity Humidity, %
- hourly.dew_point Atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- hourly.uvi UV index
- hourly.clouds Cloudiness, %
- hourly.visibility Average visibility, metres. The maximum value of the visibility is 10km
- hourly.wind_speed Wind speed. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour.How to change units used
- hourly.wind_gust (where available) Wind gust. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- hourly.wind_deg Wind direction, degrees (meteorological)
- hourly.pop Probability of precipitation. The values of the parameter vary between 0 and 1, where 0 is equal to 0%, 1 is equal to 100%
- hourly.rain
  - hourly.rain.1h (where available) Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter
- hourly.snow
  - hourly.snow.1h (where available) Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter
- hourly.weather
  - hourly.weather.id Weather condition id
  - hourly.weather.main Group of weather parameters (Rain, Snow, Clouds etc.)
  - hourly.weather.description Weather condition within the group (full list of weather conditions). Get the output in your language
  - hourly.weather.icon Weather icon id. How to get icons
daily Daily forecast weather data API response
- daily.dt Time of the forecasted data, Unix, UTC
- daily.sunrise Sunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
- daily.sunset Sunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
- daily.moonrise The time of when the moon rises for this day, Unix, UTC
- daily.moonset The time of when the moon sets for this day, Unix, UTC
- daily.moon_phase Moon phase. 0 and 1 are 'new moon', 0.25 is 'first quarter moon', 0.5 is 'full moon' and 0.75 is 'last quarter moon'. The periods in between are called 'waxing crescent', 'waxing gibbous', 'waning gibbous', and 'waning crescent', respectively. Moon phase calculation algorithm: if the moon phase values between the start of the day and the end of the day have a round value (0, 0.25, 0.5, 0.75, 1.0), then this round value is taken, otherwise the average of moon phases for the start of the day and the end of the day is taken.
- summaryHuman-readable description of the weather conditions for the day
- daily.temp Units – default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
  - daily.temp.morn Morning temperature.
  - daily.temp.day Day temperature.
  - daily.temp.eve Evening temperature.
  - daily.temp.night Night temperature.
  - daily.temp.min Min daily temperature.
  - daily.temp.max Max daily temperature.
- daily.feels_like This accounts for the human perception of weather. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
  - daily.feels_like.morn Morning temperature.
  - daily.feels_like.day Day temperature.
  - daily.feels_like.eve Evening temperature.
  - daily.feels_like.night Night temperature.
- daily.pressure Atmospheric pressure on the sea level, hPa
- daily.humidity Humidity, %
- daily.dew_point Atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- daily.wind_speed Wind speed. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- daily.wind_gust (where available) Wind gust. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- daily.wind_deg Wind direction, degrees (meteorological)
- daily.clouds Cloudiness, %
- daily.uvi The maximum value of UV index for the day
- daily.pop Probability of precipitation. The values of the parameter vary between 0 and 1, where 0 is equal to 0%, 1 is equal to 100%
- daily.rain (where available) Precipitation volume, mm. Please note that only mm as units of measurement are available for this parameter
- daily.snow (where available) Snow volume, mm. Please note that only mm as units of measurement are available for this parameter
- daily.weather
  - daily.weather.id Weather condition id
  - daily.weather.main Group of weather parameters (Rain, Snow, Clouds etc.)
  - daily.weather.description Weather condition within the group (full list of weather conditions). Get the output in your language
  - daily.weather.icon Weather icon id. How to get icons
alerts National weather alerts data from major national weather warning systems
- alerts.sender_name Name of the alert source. Please read here the full list of alert sources
- alerts.event Alert event name
- alerts.start Date and time of the start of the alert, Unix, UTC
- alerts.end Date and time of the end of the alert, Unix, UTC
- alerts.description Description of the alert
- alerts.tags Type of severe weather

National weather alerts are provided in English by default.
Please note that some agencies provide the alert’s description only in a local language.

Weather data for timestamp

To learn about how get access to weather data for any timestamp from 1st January 1979 till 4 days ahead forecast, please use this section of the documentation.

If you are interested in other functionality on One Call API 3.0, please check Product concept to follow the right section.

How to make an API call

API call

https://api.openweathermap.org/data/3.0/onecall/timemachine?lat={lat}&lon={lon}&dt={time}&appid={API key}

Parameters
`lat`	required	Latitude, decimal (-90; 90). If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
`lon`	required	Longitude, decimal (-180; 180). If you need the geocoder to automatic convert city names and zip-codes to geo coordinates and the other way around, please use our Geocoding API
`dt`	required	Timestamp (Unix time, UTC time zone), e.g. dt=1586468027. Data is available from January 1st, 1979 till 4 days ahead
`appid`	required	Your unique API key (you can always find it on your account page under the "API key" tab)
`units`	optional	Units of measurement. `standard`, `metric` and `imperial` units are available. If you do not use the `units` parameter, `standard` units will be applied by default. Learn more
`lang`	optional	You can use the `lang` parameter to get the output in your language. Learn more

Please note that the one API response contains historical weather data for only one specified timestamp.

Example of API call

https://api.openweathermap.org/data/3.0/onecall/timemachine?lat=39.099724&lon=-94.578331&dt=1643803200&appid={API key}

Example of API response

Example of API response

                   
  {
  "lat": 52.2297,
  "lon": 21.0122,
  "timezone": "Europe/Warsaw",
  "timezone_offset": 3600,
  "data": [
    {
      "dt": 1645888976,
      "sunrise": 1645853361,
      "sunset": 1645891727,
      "temp": 279.13,
      "feels_like": 276.44,
      "pressure": 1029,
      "humidity": 64,
      "dew_point": 272.88,
      "uvi": 0.06,
      "clouds": 0,
      "visibility": 10000,
      "wind_speed": 3.6,
      "wind_deg": 340,
      "weather": [
        {
          "id": 800,
          "main": "Clear",
          "description": "clear sky",
          "icon": "01d"
        }
      ]
    }
  ]
}

Fields in API response

lat Latitude of the location, decimal (−90; 90)
lon Longitude of the location, decimal (-180; 180)
timezone Timezone name for the requested location
timezone_offset Shift in seconds from UTC
data
- data.dt Requested time, Unix, UTC
- data.sunrise Sunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
- data.sunset Sunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
- data.temp Temperature. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- data.feels_like Temperature. This accounts for the human perception of weather. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- data.pressure Atmospheric pressure on the sea level, hPa
- data.humidity Humidity, %
- data.dew_point Atmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. Units – default: kelvin, metric: Celsius, imperial: Fahrenheit.
- data.clouds Cloudiness, %
- data.uvi UV index. Please pay attention that historical UV index data available only for 5 days back. If you would like to get historical UVI index data starting from 20th September 2020 please contact us
- data.visibility Average visibility, metres. The maximum value of the visibility is 10 km
- data.wind_speed Wind speed. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- data.wind_gust (where available) Wind gust. Wind speed. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
- data.wind_deg Wind direction, degrees (meteorological)
- data.weather
  - data.weather.id Weather condition id
  - data.weather.main Group of weather parameters (Rain, Snow etc.)
  - data.weather.description Weather condition within the group (full list of weather conditions). Get the output in your language
  - data.weather.icon Weather icon id. How to get icons
- data.rain (where available)
  - 1h Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter
- data.snow(where available)
  - 1h Precipitation, mm/h. Please note that only mm/h as units of measurement are available for this parameter

Daily Aggregation

To learn about how get access to aggregated weather data for a particular date from 2nd January 1979 till long-term forecast for 1,5 years ahead, please use this section of the documentation.

If you are interested in other functionality on One Call API 3.0, please check Product concept to follow the right section.

How to make an API call

API call

https://api.openweathermap.org/data/3.0/onecall/day_summary?lat={lat}&lon={lon}&date={date}&appid={API key}

Parameters
`lat`	required	Latitude, decimal (-90; 90)
`lon`	required	Longitude, decimal (-180; 180)
`date`	required	Date in the `YYYY-MM-DD` format for which data is requested. Date is available for 46+ years archive (starting from 1979-01-02) up to the 1,5 years ahead forecast to the current date
`appid`	required	Your unique API key (you can always find it on your account page under the "API key" tab)
`units`	optional	Units of measurement. `standard`, `metric` and `imperial` units are available. If you do not use the `units` parameter, `standard` units will be applied by default. Learn more
`lang`	optional	You can use the `lang` parameter to get the output in your language. Learn more

If the service detected timezone for your location incorrectly you can specify correct timezone manually by adding tz parameter in the ±XX:XX format to API call.

API call

https://api.openweathermap.org/data/3.0/onecall/day_summary?lat={lat}&lon={lon}&date={date}&tz={tz}&appid={API key}

Example of API call

https://api.openweathermap.org/data/3.0/onecall/day_summary?lat=60.45&lon=-38.67&date=2023-03-30&tz=+03:00&appid={API key}

Please pay attention that in case timezone is specified time of afternoon, night, evening, morning temperatures, pressure, humidity will be returned in accordance with this specified timezone.

Example of API call

https://api.openweathermap.org/data/3.0/onecall/day_summary?lat=39.099724&lon=-94.578331&date=2020-03-04&appid={API key}

Example of API response

Example of API response

                   
  {
   "lat":33,
   "lon":35,
   "tz":"+02:00",
   "date":"2020-03-04",
   "units":"standard",
   "cloud_cover":{
      "afternoon":0
   },
   "humidity":{
      "afternoon":33
   },
   "precipitation":{
      "total":0
   },
   "temperature":{
      "min":286.48,
      "max":299.24,
      "afternoon":296.15,
      "night":289.56,
      "evening":295.93,
      "morning":287.59
   },
   "pressure":{
      "afternoon":1015
   },
   "wind":{
      "max":{
         "speed":8.7,
         "direction":120
      }
   }
}

Fields in API response

lat Latitude of the location, decimal (−90; 90)
lon Longitude of the location, decimal (-180; 180)
tz Timezone in the ±XX:XX format
dateDate specified in the API request in the `YYYY-MM-DD` format (from 1979-01-02 up to the 1,5 years ahead forecast)
units Units of measurement specified in the request. Learn more
cloud_cover Cloud related information
- afternoonCloud cover at 12:00 for the date specified in the request, %
humidity Humidity related information
- afternoon Relative humidity at 12:00 for the date specified in the request, %
precipitation Precipitation related information
- total Total amount of liquid water equivalent of precipitation for the date specified in the request, mm
pressure Atmospheric pressure related information
- afternoon Atmospheric pressure at 12:00 for the date specified in the request, hPa
temperature Temperature related information
- min Minimum temperature for the date specified in the request. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- max Maximum temperature for the date specified in the request. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- afternoon Temperature at 12:00 for the date specified in the request. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- night Temperature at 00:00 for the date specified in the request. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- evening Temperature at 18:00 for the date specified in the request. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
- morning Temperature at 06:00 for the date specified in the request. Units - default: kelvin, metric: Celsius, imperial: Fahrenheit. How to change units used
wind Wind speed related information
- max Maximum wind speed related information
  - speed Maximum wind speed for the date specified in the request. Units – default: metre/sec, metric: metre/sec, imperial: miles/hour. How to change units used
  - direction Wind cardinal direction relevant to the maximum wind speed, degrees (meteorological)

Weather overview

This section describes how to get weather overview with a human-readable weather summary for today and tomorrow's forecast, utilizing OpenWeather AI technologies.

If you are interested in other functionality on One Call API 3.0, please check Product concept to follow the right section.

How to make an API call

API call

https://api.openweathermap.org/data/3.0/onecall/overview?lat={lat}&lon={lon}&appid={API key}

Parameters
`lat`	required	Latitude, decimal (-90; 90)
`lon`	required	Longitude, decimal (-180; 180)
`appid`	required	Your unique API key (you can always find it on your account page under the "API key" tab)
`date`	optional	The date the user wants to get a weather summary in the YYYY-MM-DD format. Data is available for today and tomorrow. If not specified, the current date will be used by default. Please note that the date is determined by the timezone relevant to the coordinates specified in the API request.
`units`	optional	Units of measurement. Standard, metric and imperial units are available. If you do not use the units parameter, standard units will be applied by default. Learn more

Example of API call

https://api.openweathermap.org/data/3.0/onecall/overview?lon=-11.8092&lat=51.509865&appid={API key}

Example of API response

                     
   {
      "lat": 51.509865,
      "lon": -0.118092,
      "tz": "+01:00",
      "date": "2024-05-13",
      "units": "metric",
      "weather_overview": "The current weather is overcast with a 
   temperature of 16°C and a feels-like temperature of 16°C. 
   The wind speed is 4 meter/sec with gusts up to 6 meter/sec 
   coming from the west-southwest direction. 
   The air pressure is at 1007 hPa with a humidity level of 79%. 
   The dew point is at 12°C and the visibility is 10000 meters. 
   The UV index is at 4, indicating moderate risk from the 
   sun's UV rays. 
   The sky is covered with overcast clouds, and there is 
   no precipitation expected at the moment. 
   Overall, it is a moderately cool and cloudy day 
   with light to moderate winds from the west-southwest."
   }

Fields in API response

lat Latitude of the location, decimal (−90; 90)
lon Longitude of the location, decimal (-180; 180)
tz Timezone in the ±XX:XX format
date Date for which summary is generated in the format YYYY-MM-DD
units Units of measurement specified in the request
weather_overviewAI generated weather overview for the requested date

AI Weather Assistant

To learn how to access weather and weather-related advice in a human-readable format, please use this section of the documentation.

If you are interested in other functionality in One Call API 3.0, please refer to the Product concept to follow the appropriate section.

The AI Weather Assistant is available via API, allowing you to integrate it directly into your applications and workflows. For your convenience, you can also explore the service in a chatbot-like format using the web interface to familiarize yourself with the service's functionality, test various use cases, and understand how the AI Weather Assistant responds to different queries before implementing it in your projects.

At the moment, the AI Weather Assistant considers current weather, minutely forecast, hourly forecast and daily forecast for the next 7 days for any location around the globe. The product offers global coverage and accepts cities, provinces or countries as valid locations. The AI weather assistant will remember the location you are inquiring about and use it for all future inquiries until a new location is specified.

Questions examples:

What's the weather in London like?
Is it a good idea to go for a swim?
Will it rain tomorrow in Paris?
What should my 8-year-old child wear?
Where is it better to go on holiday next weekend: in London or Paris?

The AI Weather Assistant understands over 50 languages, including English, French, Italian, German, Chinese, Arabic and Hindi.

The AI Weather Assistant is a work in progress. Its knowledge of the world and weather is being continuously enhanced.

How to make a call with web interface

Here you will find how to explore the service in a chatbot-like format with the web interface to familiarize yourself with the service's functionality, test various use cases, and understand how the AI Weather Assistant responds to different queries before implementing it in your projects.

The address of the web page with the web interface is:

https://openweathermap.org/weather-assistant?apikey={API key}

Ensure that you use your valid OpenWeather API key in place of api key.

Parameters
`api_key`	required	Your unique API key (you can always find it on your account page under the "API key" tab)

Upon successful validation of the API key, you will be directed to the default chat page. This page serves as the primary interface for interacting with the AI Weather Assistant, allowing to initiate conversations and request weather information seamlessly.

Enter your prompt to communicate with the AI Weather Assistant. The AI Weather Assistant will remember the location you are inquiring about and will use it for all future inquiries until a new location is specified. The topic can include queries about the weather or activities based on weather data.

How to make a call with API Endpoints

Step 1: Session start

This HTTP method is used to start a session and ask questions about the weather and weather related advice.To interact with the AI Weather Assistant, please enter your prompt following the guidelines outlined below.

In case of successful creation, the method returns an HTTP code 200.

Method: POST

Header: Content-Type: application/json

X-Api-Key: [your OpenWeather API key]

URL

https://api.openweathermap.org/assistant/session

Example of the request body

                          
        json = {
          "prompt": "What’s weather like in London?",
        }

Parameters
`prompt`	required	Query about the weather or activities based on weather data the user is asking for. If a location is not provided in the request, the AI Weather Assistant will ask to specify the location.

Example of the API response

                        
        {
          "answer": "Hello! Right now in London, it's quite 
          cloudy with overcast skies. The temperature is 
          around 9.5°C, but it feels a little cooler at 9.2°C. 
          The humidity is at 91%, so it might feel a bit damp. 
          Winds are light at 1.54 m/s coming from the southwest. 
          With these conditions, it's a cozy day to perhaps enjoy 
          indoor activities or a calm walk with a warm jacket. 
          If you're heading out, there's no rain reported 
          at the moment, but it's a good idea to keep an umbrella
          handy just in case. Stay cozy and enjoy your day in London!",
          "data": {
              "London": {
                  "Current UTC Time": "15 January 2025, 14:25",
                  "Current Week Day UTC": "Wednesday",
                  "clouds": 100,
                  "dew_point": 281.26,
                  "dt": 1736951146,
                  "feels_like": 282.19,
                  "humidity": 91,
                  "pressure": 1034,
                  "sunrise": 1736927957,
                  "sunset": 1736958011,
                  "temp": 282.65,
                  "uvi": 0.43,
                  "visibility": 10000,
                  "weather": [
                      {
                          "description": "overcast clouds",
                          "icon": "04d",
                          "id": 804,
                          "main": "Clouds"
                      }
                  ],
                  "wind_deg": 240,
                  "wind_speed": 1.54
              }
          },
          "session_id": "d47d2211-f1cf-409c-8297-617d74945571"
        }

Fields in API response

answer LLM-generated answer to the prompt
data Data that was used as the data source for generating the 'answer' part. Please note that only sections relevant to the time period mentioned in the "prompt" are included in the API response. If the user doesn’t mention a location or continues to inquire about the same location, the 'data' field will remain empty. The “data” field will contain new weather data automatically upon receiving a query related to a different location or forecast type.
- loc1Location 1 name from inquiry
  - current UTC Time Current time, UTC
  - current Week Day UTCDay of the week, UTC
  - latLatitude of the location, decimal (−90; 90)
  - lonLongitude of the location, decimal (-180; 180)
  - timezone Timezone name for the requested location
  - timezone_offsetShift in seconds from UTC
  - currentCurrent weather data API response
    - current.dtCurrent time, Unix, UTC
    - current.sunriseSunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - current.sunsetSunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - current.tempTemperature, kelvin
    - current.feels_likeTemperature. This temperature parameter accounts for the human perception of weather, kelvin.
    - current.pressureAtmospheric pressure on the sea level, hPa
    - current.humidityHumidity, %
    - current.dew_pointAtmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. Units: kelvin
    - current.cloudsCloudiness, %
    - current.uviCurrent UV index
    - current.visibilityAverage visibility, metres. The maximum value of the visibility is 10 km
    - current.wind_speed Wind speed. Wind speed. Units: metre/sec
    - current.wind_gust(where available) Wind gust, metre/sec
    - current.wind_degWind direction, degrees (meteorological)
    - current.wind_speed Wind speed. Wind speed. Units: metre/sec
    - current.rain
      - current.rain.1h(where available) Precipitation, mm/h
    - current.snow
      - current.snow.1h(where available)Precipitation, mm/h
    - current.weather
      - current.weather.idWeather condition id
      - current.weather.mainGroup of weather parameters (Rain, Snow etc.)
      - current.weather.description Weather condition within the group (full list of weather conditions)
      - current.weather.icon Weather icon id. How to get icons
  - minutelyMinute forecast weather data API response
    - minutely.dtTime of the forecasted data, unix, UTC
    - minutely.precipitationPrecipitation, mm/h.
  - hourly Hourly forecast weather data API response
    - hourly.dtTime of the forecasted data, Unix, UTC
    - hourly.tempTemperature, kelvin
    - hourly.feels_likeTemperature. This accounts for the human perception of weather, kelvin
    - hourly.pressure Atmospheric pressure on the sea level, hPa
    - hourly.humidityHumidity, %
    - hourly.dew_pointAtmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form, kelvin
    - hourly.uviUV index
    - hourly.cloudsCloudiness, %
    - hourly.visibilityAverage visibility, metres. The maximum value of the visibility is 10 km
    - hourly.wind_speed
    - hourly.wind_gust(where available)Wind gust, metre/sec
    - hourly.wind_degWind direction, degrees (meteorological)
    - hourly.pop Probability of precipitation. The values of the parameter vary between 0 and 1, where 0 is equal to 0%, 1 is equal to 100%
    - hourly.rain
      - hourly.rain.1h (where available) Precipitation, mm/h
    - hourly.snow
      - hourly.snow.1h(where available)Precipitation, mm/h
    - hourly.weather
      - current.weather.idWeather condition id
      - current.weather.mainGroup of weather parameters (Rain, Snow etc.)
      - current.weather.description Weather condition within the group (full list of weather conditions)
      - current.weather.icon Weather icon id. How to get icons
  - dailyDaily forecast weather data API response
    - daily.dtTime of the forecasted data, Unix, UTC
    - daily.sunriseSSunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - daily.sunsetSunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - daily.moonriseThe time of when the moon rises for this day, Unix, UTC
    - daily.moonsetThe time of when the moon sets for this day, Unix, UTC
    - daily.moon_phaseMoon phase. 0 and 1 are 'new moon', 0.25 is 'first quarter moon', 0.5 is 'full moon' and 0.75 is 'last quarter moon'. The periods in between are called 'waxing crescent', 'waxing gibbous', 'waning gibbous', and 'waning crescent', respectively. Moon phase calculation algorithm: if the moon phase values between the start of the day and the end of the day have a round value (0, 0.25, 0.5, 0.75, 1.0), then this round value is taken, otherwise the average of moon phases for the start of the day and the end of the day is taken
    - summaryHuman-readable description of the weather conditions for the day
    - Daily.tempkelvin
      - daily.temp.morn Morning temperature
      - daily.temp.day Day temperature
      - daily.temp.eve Evening temperature
      - daily.temp.night Night temperature
      - daily.temp.min Min daily temperature
      - daily.temp.max Max daily temperature
    - daily.feels_likeThis accounts for the human perception of weather, kelvin
      - daily.feels_like.morn Morning temperature
      - daily.feels_like.day Day temperature
      - daily.feels_like.eve Evening temperature
      - daily.feels_like.night Night temperature
    - daily.pressureAtmospheric pressure on the sea level, hPa
    - daily.humidityHumidity, %
    - daily.dew_pointAtmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form, kelvin
    - daily.wind_speedWind speed, metre/sec
    - daily.wind_gust(where available) Wind gust, metre/sec
    - daily.wind_degWind direction, degrees (meteorological)
    - daily.clouds Cloudiness, %
    - daily.uviThe maximum value of UV index for the day
    - daily.popProbability of precipitation. The values of the parameter vary between 0 and 1, where 0 is equal to 0%, 1 is equal to 100%
    - daily.rain(where available)Precipitation volume, mm
    - daily.snow(where available)Snow volume, mm
    - daily.weather
      - daily.weather.idWeather condition id
      - daily.weather.mainGroup of weather parameters (Rain, Snow etc.)
      - daily.weather.description Weather condition within the group (full list of weather conditions)
      - daily.weather.icon Weather icon id. How to get icons
- alertsNational weather alerts data from major national weather warning systems
  - alerts.sender_nameName of the alert source. Please read here the full list of alert sources
  - alerts.eventAlert event name
  - alerts.startDate and time of the start of the alert, Unix, UTC
  - alerts.endDate and time of the end of the alert, Unix, UTC
  - alerts.descriptionDescription of the alert
  - alerts.tags Type of severe weather
session_idid of a conversation session

To continue the session, please see Step 2. If you want the chatbot to disregard previous messages, return to Step 1 and begin a new session.

Step 2: Resume a session

This HTTP method is used to resume a conversation session with the chatbot. The AI Weather Assistant will remember the previous messages and retain the location you specify. It will use the location for all following inquiries until a new location is provided.

In case of successful creation, the method returns an HTTP code 200.

Method: POST

Header: Content-Type: application/json

X-Api-Key: [your OpenWeather API key]

URL

https://api.openweathermap.org/assistant/session/{session_id}

Example of the request body

                            
          json = {
            "prompt": "Do I need a hat?",
          }

Parameters
`prompt`	required	Query about the weather or activities based on weather data the user is asking for. If a location is not provided in the initial request, the AI Weather Assistant will ask to specify the location.

Example of the API response

                        
        {'answer': "Given the mild temperature of around 9.76°C 
        in London and the gentle north wind at 2.68 m/s, 
        wearing a hat could be a good idea, especially if you 
        tend to feel a bit chilly or if you're 
        sensitive to cooler weather. 
        Plus, a hat can add a nice style touch to your outfit! 
        Stay cozy and enjoy your day, whatever you choose! 😊",
        'data': {},
        'session_id': 'xxxxxxxxx'}

Fields in API response

answer LLM-generated answer to the prompt
data Data that was used as the data source for generating the 'answer' part. Please note that only sections relevant to the time period mentioned in the "prompt" are included in the API response. If the user doesn’t mention a location or continues to inquire about the same location, the 'data' field will remain empty. The “data” field will contain new weather data automatically upon receiving a query related to a different location or forecast type.
- loc1Location 1 name from inquiry
  - current UTC Time Current time, UTC
  - current Week Day UTCDay of the week, UTC
  - latLatitude of the location, decimal (−90; 90)
  - lonLongitude of the location, decimal (-180; 180)
  - timezone Timezone name for the requested location
  - timezone_offsetShift in seconds from UTC
  - currentCurrent weather data API response
    - current.dtCurrent time, Unix, UTC
    - current.sunriseSunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - current.sunsetSunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - current.tempTemperature, kelvin
    - current.feels_likeTemperature. This temperature parameter accounts for the human perception of weather, kelvin.
    - current.pressureAtmospheric pressure on the sea level, hPa
    - current.humidityHumidity, %
    - current.dew_pointAtmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form. Units: kelvin
    - current.cloudsCloudiness, %
    - current.uviCurrent UV index
    - current.visibilityAverage visibility, metres. The maximum value of the visibility is 10 km
    - current.wind_speed Wind speed. Wind speed. Units: metre/sec
    - current.wind_gust(where available) Wind gust, metre/sec
    - current.wind_degWind direction, degrees (meteorological)
    - current.wind_speed Wind speed. Wind speed. Units: metre/sec
    - current.rain
      - current.rain.1h(where available) Precipitation, mm/h
    - current.snow
      - current.snow.1h(where available)Precipitation, mm/h
    - current.weather
      - current.weather.idWeather condition id
      - current.weather.mainGroup of weather parameters (Rain, Snow etc.)
      - current.weather.description Weather condition within the group (full list of weather conditions)
      - current.weather.icon Weather icon id. How to get icons
  - minutelyMinute forecast weather data API response
    - minutely.dtTime of the forecasted data, unix, UTC
    - minutely.precipitationPrecipitation, mm/h.
  - hourly Hourly forecast weather data API response
    - hourly.dtTime of the forecasted data, Unix, UTC
    - hourly.tempTemperature, kelvin
    - hourly.feels_likeTemperature. This accounts for the human perception of weather, kelvin
    - hourly.pressure Atmospheric pressure on the sea level, hPa
    - hourly.humidityHumidity, %
    - hourly.dew_pointAtmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form, kelvin
    - hourly.uviUV index
    - hourly.cloudsCloudiness, %
    - hourly.visibilityAverage visibility, metres. The maximum value of the visibility is 10 km
    - hourly.wind_speed
    - hourly.wind_gust(where available)Wind gust, metre/sec
    - hourly.wind_degWind direction, degrees (meteorological)
    - hourly.pop Probability of precipitation. The values of the parameter vary between 0 and 1, where 0 is equal to 0%, 1 is equal to 100%
    - hourly.rain
      - hourly.rain.1h (where available) Precipitation, mm/h
    - hourly.snow
      - hourly.snow.1h(where available)Precipitation, mm/h
    - hourly.weather
      - current.weather.idWeather condition id
      - current.weather.mainGroup of weather parameters (Rain, Snow etc.)
      - current.weather.description Weather condition within the group (full list of weather conditions)
      - current.weather.icon Weather icon id. How to get icons
  - dailyDaily forecast weather data API response
    - daily.dtTime of the forecasted data, Unix, UTC
    - daily.sunriseSSunrise time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - daily.sunsetSunset time, Unix, UTC. For polar areas in midnight sun and polar night periods this parameter is not returned in the response
    - daily.moonriseThe time of when the moon rises for this day, Unix, UTC
    - daily.moonsetThe time of when the moon sets for this day, Unix, UTC
    - daily.moon_phaseMoon phase. 0 and 1 are 'new moon', 0.25 is 'first quarter moon', 0.5 is 'full moon' and 0.75 is 'last quarter moon'. The periods in between are called 'waxing crescent', 'waxing gibbous', 'waning gibbous', and 'waning crescent', respectively. Moon phase calculation algorithm: if the moon phase values between the start of the day and the end of the day have a round value (0, 0.25, 0.5, 0.75, 1.0), then this round value is taken, otherwise the average of moon phases for the start of the day and the end of the day is taken
    - summaryHuman-readable description of the weather conditions for the day
    - Daily.tempkelvin
      - daily.temp.morn Morning temperature
      - daily.temp.day Day temperature
      - daily.temp.eve Evening temperature
      - daily.temp.night Night temperature
      - daily.temp.min Min daily temperature
      - daily.temp.max Max daily temperature
    - daily.feels_likeThis accounts for the human perception of weather, kelvin
      - daily.feels_like.morn Morning temperature
      - daily.feels_like.day Day temperature
      - daily.feels_like.eve Evening temperature
      - daily.feels_like.night Night temperature
    - daily.pressureAtmospheric pressure on the sea level, hPa
    - daily.humidityHumidity, %
    - daily.dew_pointAtmospheric temperature (varying according to pressure and humidity) below which water droplets begin to condense and dew can form, kelvin
    - daily.wind_speedWind speed, metre/sec
    - daily.wind_gust(where available) Wind gust, metre/sec
    - daily.wind_degWind direction, degrees (meteorological)
    - daily.clouds Cloudiness, %
    - daily.uviThe maximum value of UV index for the day
    - daily.popProbability of precipitation. The values of the parameter vary between 0 and 1, where 0 is equal to 0%, 1 is equal to 100%
    - daily.rain(where available)Precipitation volume, mm
    - daily.snow(where available)Snow volume, mm
    - daily.weather
      - daily.weather.idWeather condition id
      - daily.weather.mainGroup of weather parameters (Rain, Snow etc.)
      - daily.weather.description Weather condition within the group (full list of weather conditions)
      - daily.weather.icon Weather icon id. How to get icons
- alertsNational weather alerts data from major national weather warning systems
  - alerts.sender_nameName of the alert source. Please read here the full list of alert sources
  - alerts.eventAlert event name
  - alerts.startDate and time of the start of the alert, Unix, UTC
  - alerts.endDate and time of the end of the alert, Unix, UTC
  - alerts.descriptionDescription of the alert
  - alerts.tags Type of severe weather
session_idid of a conversation session

Other features

List of weather condition codes

List of weather condition codes with icons (range of thunderstorm, drizzle, rain, snow, clouds, atmosphere etc.)

Units of measurement

standard, metric and imperial units are available.

List of all API parameters with available units.

API call

https://api.openweathermap.org/data/3.0/onecall?lat={lat}&lon={lon}&units={units}

Parameters
`units`	optional	Units of measurement. `standard`, `metric` and `imperial` units are available. If you do not use the `units` parameter, `standard` units will be applied by default.

Temperature is available in Fahrenheit, Celsius and Kelvin units.

Wind speed is available in miles/hour and meter/sec.

For temperature in Fahrenheit and wind speed in miles/hour, use units=imperial
For temperature in Celsius and wind speed in meter/sec, use units=metric
Temperature in Kelvin and wind speed in meter/sec is used by default, so there is no need to use the units parameter in the API call if you want this

Examples of API calls

Standard (default)

api.openweathermap.org/data/3.0/onecall?lat=30.489772&lon=-99.771335

Metric

api.openweathermap.org/data/3.0/onecall?lat=30.489772&lon=-99.771335&units=metric

Imperial


                  api.openweathermap.org/data/3.0/onecall?lat=30.489772&lon=-99.771335&units=imperial

Multilingual support

You can use lang parameter to get the output in your language.

The contents of the description field will be translated.

API call

https://api.openweathermap.org/data/3.0/onecall?lat={lat}&lon={lon}&lang={lang}

Parameters
`lang`	optional	You can use the `lang` parameter to get the output in your language.

Example of API call

https://api.openweathermap.org/data/3.0/onecall?lat=30.489772&lon=-99.771335&lang=zh_cn

We support the following languages. To select one, you can use the corresponding language code:

sq Albanian
af Afrikaans
ar Arabic
az Azerbaijani
eu Basque
be Belarusian
bg Bulgarian
ca Catalan
zh_cn Chinese Simplified
zh_tw Chinese Traditional
hr Croatian
cz Czech
da Danish
nl Dutch
en English
fi Finnish
fr French
gl Galician
de German
el Greek
he Hebrew
hi Hindi
hu Hungarian
is Icelandic
id Indonesian
it Italian
ja Japanese
kr Korean
ku Kurmanji (Kurdish)
la Latvian
lt Lithuanian
mk Macedonian
no Norwegian
fa Persian (Farsi)
pl Polish
pt Portuguese
pt_br Português Brasil
ro Romanian
ru Russian
sr Serbian
sk Slovak
sl Slovenian
sp, es Spanish
sv, se Swedish
th Thai
tr Turkish
ua, uk Ukrainian
vi Vietnamese
zu Zulu

List of national weather alerts sources

Country	Agency
Albania	Institute of GeoSciences, Energy, Water and Environment of Albania
Algeria	National Meteorological Office
Argentina	National Weather Service of Argentina
Australia	Australian Bureau of Meteorology
Austria	Central Institute for Meteorology and Geodynamics Water Balance Department
Bahrain	Bahrain Meteorological Directorate
Barbados	Barbados Meteorological Service
Belarus	State institution "Republican center for hydrometeorology, control of radioactive contamination and environmental monitoring" (Belhydromet)
Belgium	Royal Meteorological Institute
Belize	National Meteorological Service of Belize
Benin	National Meteorological Agency (METEO-BENIN)
Bosnia and Herzegovina	Federal Hydrometeorological Institute of BiH Republic Hydrometeorological Institute
Botswana	Botswana Meteorological Services
Brazil	National Meteorological Institute - INMET
Bulgaria	National Institute of Meteorology and Hydrology - Plovdiv branch
Cameroon	Cameroon National Meteorological Service
Canada	Alberta Emergency Management Agency (Government of Alberta, Ministry of Municipal Affairs) Meteorological Service of Canada Quebec Ministry of Public Safety Yukon Emergency Measures Organization Manitoba Emergency Management Organization
Chile	Meteorological Directorate of Chile
Congo	National Civil Aviation Agency (ANAC Congo)
Costa Rica	National Meteorological Institute of Costa Rica
Croatia	State Hydrometeorological Institute (DHMZ)
Curacao and Sint Maarten	Meteorological Department Curacao
Cyprus	Republic of Cyprus - Department of Meteorology
Czech Republic	Czech Hydrometeorological Institute
Denmark	Danish Meteorological Institute
Ecuador	Ecuadoran Institute for Meteorology and Hydrology (INAMHI)
Egypt	Egyptian Meteorological Authority
Estonia	Estonian Environment Agency
Eswatini	Eswatini Meteorological Service
Finland	Finnish Meteorological Institute
France	Meteo-France
Gabon	General Directorate of Meteorology of Gabon
Germany	German Meteorological Office
Ghana	Ghana Meteorological Agency
Greece	Hellenic National Meteorological Service
Guinea	National Meteorological Agency of Guinea
Guyana	Hydrometeorological Service of Guyana
Hong Kong China	Hong Kong Observatory
Hungary	Hungarian Meteorological Service
Iceland	Icelandic Meteorological Office
India	India Meteorological Department
Indonesia	Agency for Meteorology Climatology and Geophysics of Republic Indonesia (BMKG) InaTEWS BMKG
Ireland	Met Eireann - Irish Meteorological Service
Israel	Israel Meteorological Service
Italy	Italian Air Force National Meteorological Service
Ivory Coast	Airport, aeronautical and meteorological operating and development company (SODEXAM)
Jamaica	Meteorological Service of Jamaica
Japan	Japan Meteorological Business Support Center
Jordan	Jordanian Meteorological Department
Kazakhstan	National Hydrometeorological Service of the Republic of Kazakhstan (Kazhydromet)
Kenya	Kenya Meteorological Department
Kuwait	Kuwait Meteorological Department
Latvia	Latvian Environment, Geology and Meteorology Center
Lesotho	Lesotho Meteorological Services
Libya	Libyan National Meteorological Center
Lithuania	Lithuanian Hydrometeorological Service under the Ministry of Environment of the Republic of Lithuania (LHMS)
Luxembourg	Luxembourg Airport Administration
Macao China	Macao Meteorological and Geophysical Bureau
Madagascar	METEO Madagascar
Malawi	Malawi Department of Climate Change and Meteorological Services
Maldives	Maldives Meteorological Service
Mauritania	National Meteorological Office of Mauritania
Mauritius	Mauritius Meteorological Services
Mexico	CONAGUA - National Meteorological Service of Mexico
Moldova	State Hydrometeorological Service of Moldova
Mongolia	National Agency Meteorology and the Environmental Monitoring of Mongolia
Mozambique	National Institute of Meteorology of Mozambique
Myanmar	Myanmar Department of Meteorology and Hydrology
Netherlands	Royal Netherlands Meteorological Institute (KNMI)
New Zealand	Meteorological Service of New Zealand Limited National Emergency Management Agency Fire and Emergency New Zealand Civil Defence Emergency Management (CDEM) Groups
New Zealand	New Zealand Emergency Mobile Alert
Niger	National Meteorological Directorate of Niger
Nigeria	Nigerian Meteorological Agency (NiMet)
North Macedonia	National Hydrometeorological Service - Republic of Macedonia
Norway	Norwegian Meteorological Institute Norwegian Water Resources and Energy Directorate
Paraguay	Directorate of Meteorology and Hydrology
Philippines	Philippine Atmospheric Geophysical and Astronomical Services Administration
Poland	Institute of Meteorology and Water Management (IMGW-PIB)
Portugal	Portuguese Institute of Sea and Atmosphere, I.P.
Qatar	Qatar Meteorology Department
Republic of Korea	Korea Meteorological Administration, Weather Information
Romania	National Meteorological Administration
Russia-EN	Hydrometcenter of Russia
Russia-RU	Russian Federal Service for Hydrometeorology and Environmental Monitoring
Saudi Arabia	National Center for Meteorology - Kingdom of Saudi Arabia
Serbia	Republic Hydrometeorological Service of Serbia
Seychelles	Seychelles Meteorological Authority
Singapore	Meteorological Service Singapore
Slovakia	Slovak Hydrometeorological Institute
Slovenia	National Meteorological Service of Slovenia
Solomon Islands	Solomon Islands Meteorological Services
South Africa	South African Weather Service (SAWS)
Spain	State Meteorological Agency (AEMET)
Sudan	Sudan Meteorological Authority
Sweden	Swedish Meteorological and Hydrological Institute
Switzerland	MeteoSwiss
Tanzania	Tanzania Meteorological Authority
Thailand	Thai Meteorological Department
Timor-Leste	National Directorate of Meteorology and Geophysics of Timor-Leste
Trinidad and Tobago	Trinidad and Tobago Meteorological Service
Ukraine	Ukrainian Hydrometeorological Center
United Kingdom of Great Britain and Northern Ireland	UK Met Office
Uruguay	Uruguayan Institute of Meteorology
United States	Environmental Protection Agency (EPA), Air Quality Alerts Integrated Public Alerrt and Warning System (IPAWS) National Oceanic and Atmospheric Administration (NOAA), National Tsunami Warning Center National Oceanic and Atmospheric Administration (NOAA), National Weather Service National Oceanic and Atmospheric Administration (NOAA), National Weather Service - Marine Zones U.S. Geological Survey (USGS), Volcano Hazard Program
USA	National Oceanic and Atmospheric Administration
Yemen	Yemeni Civil Aviation and Meteorology Authority (CAMA)
Zambia	Meteorological Department Zambia
Zimbabwe	Meteorological Services Department

Please note that some agencies from the list may cease to provide us the weather alert information.
In case you don’t receive alerts from any agency, please contact us.
We constantly work on our product’s improvement and keep expanding the list of partner agencies.

Call back function for JavaScript code

To use JavaScript code you can transfer callback functionName to JSONP callback.

API call example


                           api.openweathermap.org/data/3.0/onecall?lat=38.8&lon=12.09&callback=test

                           
test({
  "lat": 40.12,
  "lon": -96.66,
  "timezone": "America/Chicago",
  "timezone_offset": -18000,
  "current": {
    "dt": 1595243443,
    "sunrise": 1595243663,
    "sunset": 1595296278,
    "temp": 293.28,
    "feels_like": 293.82,
    "pressure": 1016,
    "humidity": 100,
    "dew_point": 293.28,
    "uvi": 10.64,
    "clouds": 90,
    "visibility": 10000,
    "wind_speed": 4.6,
    "wind_deg": 310,
    "weather": [
      {
        "id": 501,
        "main": "Rain",
        "description": "moderate rain",
        "icon": "10n"
      },
      {
        "id": 201,
        "main": "Thunderstorm",
        "description": "thunderstorm with rain",
        "icon": "11n"
      }
    ],
    "rain": {
      "1h": 2.93
    }
  },
  "minutely": [
    {
      "dt": 1595243460,
      "precipitation": 2.928
    },
    ...
  },
    "hourly": [
    {
      "dt": 1595242800,
      "temp": 293.28,
      "feels_like": 293.82,
      "pressure": 1016,
      "humidity": 100,
      "dew_point": 293.28,
      "clouds": 90,
      "visibility": 10000,
      "wind_speed": 4.6,
      "wind_deg": 123,
      "weather": [
        {
          "id": 501,
          "main": "Rain",
          "description": "moderate rain",
          "icon": "10n"
        }
      ],
      "pop": 0.99,
      "rain": {
        "1h": 2.46
      }
    },
    ...
  }
"daily": [
    {
      "dt": 1595268000,
      "sunrise": 1595243663,
      "sunset": 1595296278,
      "temp": {
        "day": 298.82,
        "min": 293.25,
        "max": 301.9,
        "night": 293.25,
        "eve": 299.72,
        "morn": 293.48
      },
      "feels_like": {
        "day": 300.06,
        "night": 292.46,
        "eve": 300.87,
        "morn": 293.75
      },
      "pressure": 1014,
      "humidity": 82,
      "dew_point": 295.52,
      "wind_speed": 5.22,
      "wind_deg": 146,
      "weather": [
        {
          "id": 502,
          "main": "Rain",
          "description": "heavy intensity rain",
          "icon": "10d"
        }
      ],
      "clouds": 97,
      "pop": 1,
      "rain": 12.57,
      "uvi": 10.64
    },
    ...
    },
"alerts": [
    {
      "sender_name": "NWS Tulsa (Eastern Oklahoma)",
      "event": "Heat Advisory",
      "start": 1597341600,
      "end": 1597366800,
      "description": "...HEAT ADVISORY REMAINS IN EFFECT FROM 1 PM THIS AFTERNOON TO\n8 PM CDT THIS EVENING...\n* WHAT...Heat index values of 105 to 109 degrees expected.\n* WHERE...Creek, Okfuskee, Okmulgee, McIntosh, Pittsburg,\nLatimer, Pushmataha, and Choctaw Counties.\n* WHEN...From 1 PM to 8 PM CDT Thursday.\n* IMPACTS...The combination of hot temperatures and high\nhumidity will combine to create a dangerous situation in which\nheat illnesses are possible."
    },
    ...
  ]
  })

API errors

Structure of API errors

In case of incorrected API call you will receive API error response. Error response payload returned for all types of errors with the structure below.

Example of error response

Example of error response

                
{
    "code":400,
    "message":"Invalid date format",
    "parameters": [
        "date"
    ]
}

Fields in error response

code Code of error
message Description of error
parameters(optional) List of request parameters names that are related to this particular error

Errors list

Please find more detailed information about some popular errors below.

API calls return an error 400

Error 400 - Bad Request. You can get error 400 error if either some mandatory parameters in the request are missing or some of request parameters have incorrect format or values out of allowed range. List of all parameters names that are missing or incorrect will be returned in `parameters`attribute of the `ErrorResponse` object.

API calls return an error 401

Error 401 - Unauthorized. You can get 401 error if API token did not providen in the request or in case API token provided in the request does not grant access to this API. You must add API token with granted access to the product to the request before returning it.

API calls return an error 404

Error 404 - Not Found. You can get 404 error if data with requested parameters (`lat`, `lon`, `date`) does not exist in service database. You must not retry the same request.

API calls return an error 429

Error 429 - Too Many Requests. You can get 429 error if key quota of requests for provided API to this API was exceeded. You may retry request after some time or after extending your key quota.

API calls return errors '5xx'

Errors 5xx - Unexpected Error. You can get '5xx' error in case of other internal errors. Error Response code will be `5xx`. Please contact us and enclose an example of your API request that receives this error into your email to let us analyze it and find a solution for you promptly. You may retry the request which led to this error.