The world's national weather services - ECMWF, NOAA, Deutscher Wetterdienst, Météo-France and a dozen more - publish some of the most valuable data on Earth, and they publish it openly. Yet most weather apps and APIs are resellers: they take that same public model output, wrap it in a black box, and charge you for the privilege of not knowing where the number came from.
We provide one of the best and most affordable enterprise-grade weather APIs, built on open data. We ingest model runs directly, process them in our own pipeline, and serve them two ways: as free weather pages for every town on Earth, and as an API you can build a business on. Same data, same instant, both audiences.
Two systems. A data plane continuously syncs 30+ weather models into a purpose-built time-series database, decodes radar, runs optical-flow nowcasting, and archives every forecast next to what actually happened. A web layer - the site you're reading and the metered API - sits in front of it. The forecast engine at the core is Open-Meteo, open-source software we run ourselves rather than an API we resell.
That architecture is deliberate. Because the data is open and the engine is open-source, nothing here depends on a vendor relationship that can be revoked - the fate that killed Dark Sky, Weather Underground's API, and every service built on top of them.
On accuracy. No forecast is right all the time, and anyone claiming otherwise is selling something. What we can promise is transparency: which model, which run, how it has performed lately. Our API exposes all three.
WeatherMetro is a product, built by a small team that got tired of weather APIs disappearing. We're reachable at - for support, enterprise questions, or to tell us the forecast for your town is wrong.
The data we stand on is credited in full on our attribution page.