Weather · head-to-head
Open-Meteo vs US Weather
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.
The National Weather Service API serves official US government forecasts, active alerts, and observation-station data as GeoJSON and JSON-LD feeds, with no signup or API key required. It's widely used by third-party weather apps and accepts direct browser calls, though it requires a descriptive User-Agent header identifying your application on every request.
| Open-Meteo | US Weather | |
|---|---|---|
| Authentication | None | None |
| Pricing | freemium | free |
| Formats | JSON, CSV, XLSX, FlatBuffers | GeoJSON, JSON-LD, CAP/XML, DWML/XML, ATOM |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
US Weather supports 5 response formats, while Open-Meteo offers fewer — pick US Weather for more integration flexibility.