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FMI Open Data API vs Open-Meteo API

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

The verdict

  • Choose FMI Open Data API if its data fits your use case better; on access and reliability it's level with Open-Meteo API.
  • Choose Open-Meteo API if you want faster responses.

Side by side

FMI Open Data APIOpen-Meteo API
What it doesFinnish weather, sea, climate and radar observations via open WFS.Global weather forecast API for non-commercial use.
ProviderFinnish Meteorological InstituteOpen-Meteo.com
API keyNot neededNot needed
HTTPSYesYes
CORS (browser calls)YesYes
Status todayOnline · 1444 msOnline · 522 ms
Uptime (30 days)UpUp
Developer ratingNot rated yetNot rated yet
PriceFree / free tierFree / free tier
FMI Open Data docs ↗Open-Meteo docs ↗

About each API

FMI Open Data logoFMI Open Data API

Finnish weather, sea, climate and radar observations via open WFS.

The majority of the Finnish Meteorological Institute's data is available as open data. The data is in a machine-readable, digital format.

Strengths

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

Ratings, reviews and FAQ →

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 →

How to choose between them

  • Prototyping or a tutorial? Pick the one that needs no API key (both qualify).
  • 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.

FMI Open Data vs Open-Meteo FAQ

Do FMI Open Data API and Open-Meteo API need an API key?

Neither needs an API key; you can call both straight away.

More comparisons

FMI Open Data API alternatives · Open-Meteo API alternatives · best Weather APIs