Weather · head-to-head
7Timer! vs US Weather
7Timer! generates numerical weather forecasts from NOAA/NCEP's Global Forecast System across roughly 1.5 million global grid points, refreshed four times daily. Beyond standard meteorological fields (cloud cover, temperature, wind, precipitation), it produces astronomy-specific products like "astro seeing" and atmospheric transparency for stargazing/observation planning, with forecast ranges from 3 days (ASTRO) up to a 9-16 day overview product.
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.
| 7Timer! | US Weather | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | free |
| Formats | JSON, XML, PNG | GeoJSON, JSON-LD, CAP/XML, DWML/XML, ATOM |
| CORS | no | yes |
| HTTPS | No | Yes |
US Weather supports CORS, while 7Timer! doesn't — pick US Weather for direct browser calls.