Open-Meteo

API

Open-source weather API, no key needed for non-commercial use

Price: Free for non-commercial, then paid
Access: None, API key for commercial use

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Repo
OpenAPI

About

Open-source weather API with forecasts, historical data back to 1940, air quality and marine data, built on national weather services' models. Non-commercial use needs no key; commercial use needs a paid plan. It can be self-hosted with Docker.

What you can do with it

Get hourly and daily forecasts for any latitude and longitude
Look up historical weather data back to 1940
Get air quality, marine and flood forecasts for a location

Get started

Pick a latitude, longitude and the weather variables you need
Credit Open-Meteo; the data is CC BY 4.0

Example

curl "https://api.open-meteo.com/v1/forecast?latitude=52.52&longitude=13.41&hourly=temperature_2m"

Details

Hosting: Hosted service, Self-hosted
Available in: Worldwide
Official SDKs: Python, JavaScript/TypeScript, Kotlin
MCP server: None