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Automatic Weather Stations vs wttr.in

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

APIAutomatic Weather StationsNEW—wttr.inNEW—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished (informal per-IP throttling)
In directory since2026-07-052026-07-05
operationalpartialdownno data

Automatic Weather Stations vs wttr.in: common questions

Which is more reliable, Automatic Weather Stations or wttr.in?

On our scheduled checks, wttr.in leads on measured uptime — Automatic Weather Stations at —% versus wttr.in 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 wttr.in need an API key?

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

Can I call Automatic Weather Stations and wttr.in from the browser?

Yes — both Automatic Weather Stations and wttr.in send CORS headers over HTTPS, so front-end code can fetch either directly with no backend proxy. That makes them easy to swap in a client-side app while you compare responses.

Are Automatic Weather Stations and wttr.in free for commercial use?

Automatic Weather Stations has unclear commercial terms, and wttr.in has unclear commercial terms. 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.