World Meteorological Organization

World Weather Information Service API

The WMO World Weather Information Service (WWIS) provides public JSON endpoints delivering official city weather forecasts and climatological data contributed by WMO member national meteorological and hydrological services. Data is freely accessible by city identifier with no authentication required. City forecasts include temperature, wind, humidity, and precipitation; climatological normals cover monthly averages. A full city list with identifiers is available for programmatic enumeration of supported locations.

GitHub

Documentation

📖
Documentation
https://worldweather.wmo.int/en/dataguide.html

Other Resources

🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/wmo/refs/heads/main/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: wmo:world-weather-information-service-api
name: World Weather Information Service API
tags:
- Weather
- Forecast
- Climate
tags_raw:
- Weather
- Forecasts
- Climate
humanURL: https://worldweather.wmo.int/en/dataguide.html
baseURL: https://worldweather.wmo.int/en/json/
properties:
- url: https://worldweather.wmo.int/en/dataguide.html
  type: Documentation
description: The WMO World Weather Information Service (WWIS) provides public JSON endpoints delivering
  official city weather forecasts and climatological data contributed by WMO member national meteorological
  and hydrological services. Data is freely accessible by city identifier with no authentication required.
  City forecasts include temperature, wind, humidity, and precipitation; climatological normals cover
  monthly averages. A full city list with identifiers is available for programmatic enumeration of supported
  locations.