Open-Meteo vs weather-api

Open-Meteo is an open-source weather API that blends forecast and historical data from national weather services like NOAA, DWD, and Meteo-France, automatically selecting the highest-resolution model available for a given location. It requires no API key for non-commercial use and covers specialized domains including marine conditions, air quality, flood risk, and long-range climate projections.

This is an MIT-licensed Go application that returns current conditions, wind speed, and a three-day forecast as JSON for a city name. The author runs a free public demo at goweather.xyz/v2/weather/{city}. It needs no key and sends open CORS headers. The older /weather/{city} route on that host now returns 404, so use the /v2 path. The repo is not archived, and the last push was in October 2026. You can also build the app and host it yourself.