Weather APIs power everything from a five-day forecast widget to agriculture dashboards and logistics routing. The options below range from no-key global models like Open-Meteo to commercial providers with hyperlocal radar and historical archives. Compare pricing and rate limits first — free tiers usually cap calls per minute, which matters once your app gets users.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| 7Timer! Weather, especially for Astroweather | Freemium | No | No | Profile | |
| APIXU Weather | Freemium | API Key | No | Profile | |
| AQICN Air Quality Index Data for over 1000 cities | Freemium | API Key | No | Profile | |
| AccuWeather Weather and forecast data | Freemium | API Key | No | Profile | |
| Aemet Weather and forecast data from Spain | Freemium | API Key | Unknown | Profile | |
| AviationWeather NOAA aviation weather forecasts and observations | Free | No | No | Profile | |
| ColorfulClouds Weather | Freemium | API Key | No | Profile | |
| DFlight API [DFlight API](https://ljaero.com/solutions/dflight/) supplies the up-to-date information needed for compliance with UAV preflight assessment requirements. Separate endpoints are available for each of the following inform | Unknown | Unknown | Yes | Profile | |
| Euskalmet Meteorological data of the Basque Country | Freemium | API Key | No | Profile | |
| Foreca Weather | Freemium | OAuth | No | Profile | |
| GribStream Global weather forecast API for any use. Leverage the NBM and GFS models. Great for bulk pulls | Freemium | API Key | No | Profile | |
| Groundhog Day API This API returns all of North America’s prognosticating animals and their yearly weather predictions. | Unknown | Unknown | Yes | Profile | |
| HG Weather Provides weather forecast data for cities in Brazil | Freemium | API Key | Yes | Profile | |
| Hail History API Radar-detected hail history for any US address from NOAA NEXRAD Level-III hail detections, by year | Paid | Unknown | Yes | Profile | |
| Hong Kong Obervatory Provide weather information, earthquake information, and climate data | Free | No | No | Profile | |
| IP2Location IP Geolocation API IP2Location web service providing a service to do a reverse lookup of an IP address to an ISO3166 country code, region or state, city, latitude and longitude, ZIP/Postal code, time zone, Internet Service Provider (ISP) o | Paid | OAuth | Yes | Profile | |
| IPMA API Portuguese weather and climate data | Unknown | Unknown | Unknown | Profile | |
| Korea Meteorological Administration Weather and climate data from KMA | Free | API Key | Yes | Profile | |
| Meltema API Multi-model weather: GFS, ECMWF AIFS/IFS and a 31-member GEFS ensemble, keyless point forecasts | Unknown | Unknown | No | Profile | |
| Met Office DataPoint Weather data for the UK | Freemium | API Key | No | Profile | |
| Meteoblue Global weather data with 100+ weather variables, 14 days ahead and 4 days of history data. | Freemium | API Key | Yes | Profile | |
| Meteorologisk Institutt Weather and climate data | Free | Other | Yes | Profile | |
| Meteosource Global weather forecasts based on machine learning and historical data | Freemium | API Key | No | Profile | |
| Micro Weather API Real time weather forecasts and historic data | Unknown | API Key | Unknown | Profile | |
| ODWeather Weather and weather webcams | Free | No | Unknown | Profile | |
| Oceandrivers ODWeather API This is the api to access the ODWeather API information | Unknown | Unknown | Yes | Profile | |
| Oikolab 70+ years of global, hourly historical and forecast weather data from NOAA and ECMWF | Freemium | API Key | Yes | Profile | |
| Open-Meteo Global weather forecast API for non-commercial use | Free | No | Yes | Profile | |
| Open-Meteo API Open-Meteo free weather forecast API with no API key required: hourly and daily forecasts, historical data, air quality, marine, and climate models worldwide. | Freemium | No | Yes | Profile | |
| OpenUV Real-time UV Index Forecast | Freemium | API Key | Yes | Profile | |
| OpenWeatherMap Weather | Freemium | API Key | No | Profile | |
| QWeather Location-based weather data | Freemium | API Key | Yes | Profile | |
| RainViewer Radar data collected from different websites across the Internet | Free | No | No | Profile | |
| Storm Glass Global marine weather from multiple sources | Freemium | API Key | No | Profile | |
| Tomorrow Weather API Powered by Proprietary Technology | Freemium | API Key | No | Profile | |
| US Weather US National Weather Service | Free | No | Yes | Profile | |
| Visual Crossing Global historical and weather forecast data | Freemium | API Key | Unknown | Profile | |
| WeatherAPI Weather API with other stuff like Astronomy and Geolocation API | Freemium | API Key | Yes | Profile | |
| Weatherbit Weather | Freemium | API Key | No | Profile | |
| Weatherstack API Real-Time & Historical World Weather Data API | Freemium | API Key | Unknown | Profile | |
| Yandex.Weather Assesses weather condition in specific locations | Freemium | API Key | Yes | Profile | |
| climateKuul live API climateKuul live API public API. | Unknown | API Key | Yes | Profile | |
| openSenseMap Data from Personal Weather Stations called senseBoxes | Free | No | Yes | Profile | |
| weather-api A RESTful free API to check the weather | Free | No | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.