Open-Meteo
Free weather forecast, current conditions and historical data for any coordinates. No key, no signup.
OpenWeatherMap is the default weather API — and its free tier shows it: a key is mandatory, calls are capped, and the useful data (minutely forecasts, weather maps, alerts) sits behind paid plans. Developers go looking for an OpenWeatherMap alternative when the key wall, the rate limit, or the invoice arrives.
The classic weather API — current weather, forecasts and maps for any city on Earth.
Free weather forecast, current conditions and historical data for any coordinates. No key, no signup.
Weather, forecasts, astronomy and sports weather with a generous free plan.
Weather API Powered by Proprietary Technology
Turn city names into coordinates and back, worldwide, in many languages.
Open-Meteo. No key, no signup, no call cap to babysit, data good enough for production weather apps — and it is the #1 pick below for a reason. WeatherAPI.com is the runner-up if you want a dashboard-and-key setup.