Open-Meteo Has a Free Weather API — No Key, No Signup, Real Forecast Data

Most weather APIs hide behind registration walls, throttle free accounts heavily, or charge immediately for anything useful. Open-Meteo is different: completely free, no API key, no account, open-source, and it returns real hourly/daily forecasts. One URL, no auth: https://api.open-meteo.com/v1/forecast?latitude=40.7128&longitude=-74.0060&current=temperature_2m,wind_speed_10m Try it right now: curl "https://api.open-meteo.com/v1/forecast?latitude=40.7128&longitude=-74.0060&current=temperature_2m,wind_speed_10m,relative_humidity_2m,weather_code" Response: { "latitude": 40.710335, "longitude": -73.99235, "timezone": "GMT", "current": { "time": "2026-03-26T16:15", "temperature_2m": 18.0, "wind_speed_10m": 19.0, "relative_humidity_2m": 50, "weather_code": 0 }, "current_units": { "temperature_2m": "°C", "wind_speed_10m": "km/h", "relative_humidity_2m": "%", "weather_code": "wmo code" } } No API key header. No rate limit response. No credit card. How it works: latitude + long