Open-Meteo
Weather API providing forecast and historical weather data from national weather services.
HN commenters like it as a weather API that returns both forecast and historical data in easy-to-consume formats123, and use it to power their own weather apps and demos.4567 The only complaint is occasional timeouts even at a handful of calls per hour8, which led one user to switch to Met Norway's API.9
Why people recommend it
Weather app backend · 3
Developers use it as the data source for their own iOS, Android and web weather apps.
“Open-Meteo is amazing.”
“Forecasts come from national and international weather institutes via https://open-meteo.com/”
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“They have the only weather API I know of that can get both forecast and historical weather with just a single call”
Historical data · 3
Offers historical weather data back to 1940, and can return it with the forecast in a single call.
“They have the only weather API I know of that can get both forecast and historical weather with just a single call”
“They’ve got pretty extensive historical and forecast weather apis in easy to consume formats.”
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“For temperature, I use Open-Meteo and only consider the last ten years”
Easy API · 2
Commenters call its APIs easy to consume and use them for quick demos.
“They’ve got pretty extensive historical and forecast weather apis in easy to consume formats.”
“Thanks for the service, I use it for demos all the time!”
Data quality · 1
One user paired it with Breezy Weather and called it the best weather data they have had, with useful long-term predictions.
“Partially because of the data source”
Caveats and dissent
Timeouts · 1
One user saw occasional timeouts even at a handful of calls per hour and switched to Met Norway's API.
“experienced occasional timeouts even when only making a handful of calls per hour”
Who recommends it in their own words
Threads where it came up
- Open-Meteo is a free and open-source weather API for non-commercial use 4 mentions
- Show HN: Unfenced – Land for sale that borders public land 1 mention
- Ask HN: What are you working on? (August 2026) 1 mention
- Show HN: Brolly, a plain-text weather forecast site 1 mention
- Synaps a self-hosted personal health monitor as a weighted knowledge grap 1 mention
- Europe's next-generation weather satellite sends back first images 1 mention
Data: open-meteo.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 9
“For temperature, I use Open-Meteo and only consider the last ten years”
“Forecasts come from national and international weather institutes via https://open-meteo.com/”
“They have the only weather API I know of that can get both forecast and historical weather with just a single call”
“Open-Meteo, I'm mad about this stuff”
“They’ve got pretty extensive historical and forecast weather apis in easy to consume formats.”
“Partially because of the data source”
“Thanks for the service, I use it for demos all the time!”
“Open-Meteo is amazing.”
“experienced occasional timeouts even when only making a handful of calls per hour”