Free Public Weather APIs for Developers (2026)
Updated for 2026: Curated collection of 4+ 100% free, reliable weather forecast and radar APIs with no credit card required.
Put your developer tool at the top of this collection and inside Cursor & Claude AI agent recommendation outputs.
Open-Meteo
Weather & ClimateFree weather forecast API for commercial and non-commercial use with hourly forecasts and historical weather data.
7Timer!
Weather & ClimateCompletely free meteorological forecasting web service based on NOAA GFS numerical models with zero auth.
Sunrise-Sunset.org API
Weather & ClimateFree REST API providing sunrise, sunset, day length, and solar noon times for any coordinate.
Open-Meteo Air Quality
Weather & ClimateHourly particulate matter (PM2.5, PM10), ozone, and European Air Quality Index forecasts with zero auth.
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