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Open-Meteo API vs OpenWeatherMap API

Two free Weather APIs compared on access, reliability and developer ratings, using data from our daily health checks.

The verdict

  • Choose Open-Meteo API if you want to start without an API key, to call it from browser JavaScript.
  • Choose OpenWeatherMap API for its data: Explore OpenWeather's vast range of weather APIs including the versatile One Call API 4.0.

Side by side

Open-Meteo APIOpenWeatherMap API
What it doesGlobal weather forecast API for non-commercial use.Explore OpenWeather's vast range of weather APIs including the versatile One Call API 4.0.
ProviderOpen-Meteo.comopenweathermap.org
API keyNot neededRequired
HTTPSYesYes
CORS (browser calls)YesUnknown
Status todayOnline · 522 msOnline · 527 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
Open-Meteo docs ↗OpenWeatherMap docs ↗

About each API

Open-Meteo logoOpen-Meteo API

Global weather forecast API for non-commercial use.

Open-Source ☀️ Weather API with free access for non-commercial use. No API Key required ✅. Accurate weather forecasts for any location. Open-Meteo provides high-resolution open data ranging from 1 to 11 kilometres from national weather services. With a user-friendly JSON API, integrating weather da…

Strengths

  • No API key needed
  • Callable from the browser (CORS)
  • HTTPS

Ratings, reviews and FAQ →

OpenWeatherMap logoOpenWeatherMap API

Explore OpenWeather's vast range of weather APIs including the versatile One Call API 4.0.

Explore OpenWeather's vast range of weather APIs including the versatile One Call API 4.0. Ideal for both beginners and professionals, our APIs offer current weather, minute-by-minute forecasts, historical data archives, and future predictions. Access weather data starting from 01-01-1979, global w…

Strengths

  • HTTPS

Ratings, reviews and FAQ →

How to choose between them

  • Prototyping or a tutorial? Pick the one that needs no API key.
  • Calling from a web page? You need CORS. Otherwise route requests through your own server or a serverless function.
  • Going to production? Favour HTTPS, a strong uptime record and a provider with clear rate limits and terms. Check each API's docs before you commit.
  • Still unsure? Both are free to try: send one request to each and compare the data you get back.

Open-Meteo vs OpenWeatherMap FAQ

Which needs an API key, Open-Meteo API or OpenWeatherMap API?

OpenWeatherMap API requires an API key; Open-Meteo API doesn't, so Open-Meteo API is quicker to try.

Which can I call from the browser?

Open-Meteo API supports CORS, so front-end JavaScript can call it directly. Call the other from a server.

More comparisons

Open-Meteo API alternatives · OpenWeatherMap API alternatives · best Weather APIs