Weather · head-to-head
7Timer! vs Open-Meteo
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.
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.
| 7Timer! | Open-Meteo | |
|---|---|---|
| Authentication | None | None |
| Pricing | free | freemium |
| Formats | JSON, XML, PNG | JSON, CSV, XLSX, FlatBuffers |
| CORS | no | yes |
| HTTPS | No | Yes |
Open-Meteo supports CORS, while 7Timer! doesn't — pick Open-Meteo for direct browser calls.