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Automatic Weather Stations vs AviationWeather

Same instrument, two spec sheets — measured, not claimed.

APIAutomatic Weather StationsNEW—AviationWeatherNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesno
HTTPSyesyes
Card requirednono
Commercial useunclearyes
Data licenseUnverifiedPublic domain (U.S. Government / NOAA)
Free tierFree — limits not publishedFree, no key
Rate limitUnpublishedUnpublished (NWS requests reasonable use)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Automatic Weather Stations vs AviationWeather: common questions

Which is more reliable, Automatic Weather Stations or AviationWeather?

On our scheduled checks, AviationWeather leads on measured uptime — Automatic Weather Stations at —% versus AviationWeather at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.

Do Automatic Weather Stations and AviationWeather need an API key?

Neither needs a paid key — Automatic Weather Stations is callable with no signup, and AviationWeather is callable with no signup. Both are quick to prototype with; rate limits still apply.

Can I call Automatic Weather Stations and AviationWeather from the browser?

Only Automatic Weather Stations is browser-friendly — it returns CORS headers over HTTPS. AviationWeather needs a server-side call or proxy, so factor that into which one fits a front-end project.

Are Automatic Weather Stations and AviationWeather free for commercial use?

Automatic Weather Stations has unclear commercial terms, and AviationWeather allows commercial use on its free tier. We track service terms and the data license as separate fields — see the Commercial use and Data license rows above, and confirm both before shipping either in a paid product.