Weather – Free-tier APIs
39 Free-tier APIs in the category Weather. Free public web APIs that developers and AI agents can call. Entries come from the open public-apis list; each link was checked automatically (HTTP status) on the date shown, which says the site responded, not that the API is good.
AccuWeather
Weather and forecast data
Aemet
Weather and forecast data from Spain
APIXU
Weather
AQICN
Air Quality Index Data for over 1000 cities
ColorfulClouds
Weather
Euskalmet
Meteorological data of the Basque Country
FMI Open Data
Finnish weather, sea, climate and radar observations via open WFS
Foreca
Weather
Hail History
Radar-detected hail history for any US address from NOAA NEXRAD Level-III hail detections, by year
HG Weather
Provides weather forecast data for cities in Brazil
Hong Kong Obervatory
Provide weather information, earthquake information, and climate data
IPMA
Portuguese weather and climate data
KNMI
Dutch weather, radar and climate data
Met Office DataHub
UK weather forecasts and climate data
Meteorologisk Institutt
Weather and climate data
Météo-France
French weather forecasts and alerts
NASA POWER
Global solar and weather data for energy and agriculture
NOAA CO-OPS
US coastal tides, water levels, currents and meteorological observations
Oikolab
70+ years of global, hourly historical and forecast weather data from NOAA and ECMWF
Open-Meteo Ensemble
Weather ensemble forecasts from multiple models
openSenseMap
Data from Personal Weather Stations called senseBoxes
OpenUV
Real-time UV Index Forecast
OpenWeatherMap
Weather
QWeather
Location-based weather data
Rainbow Weather
Global real-time nowcasting API powered by radar + satellite fusion
RainViewer
Radar data collected from different websites across the Internet
Storm Glass
Global marine weather from multiple sources
Terrace Weather
Terrace open/closed verdict for restaurants, from the weather forecast
Tomorrow
Weather API Powered by Proprietary Technology
US Weather
US National Weather Service
Visual Crossing
Global historical and weather forecast data
weather-api
A RESTful free API to check the weather
WeatherAPI
Weather API with other stuff like Astronomy and Geolocation API
Weatherbit
Weather
Weatherstack
Real-Time & Historical World Weather Data API
WeatherTotals
Measured US snow, rain, hail and aurora totals by state and city
World Time & Weather
Current weather, local time, UTC offset and DST rules for 400 cities as static JSON
wttr.in
Weather in your terminal, supports JSON output
Yandex.Weather
Assesses weather condition in specific locations