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Automatic Weather Stations vs Groundhog Day API

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

APIAutomatic Weather StationsHEALTHY87Groundhog Day APIHEALTHY98
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms986262
P95 · ms1949596
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree — limits not published
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Automatic Weather Stations vs Groundhog Day API: common questions

Which is more reliable, Automatic Weather Stations or Groundhog Day API?

Both are neck-and-neck — Automatic Weather Stations and Groundhog Day API each measure 100% uptime over 90 days on our probe schedule. Reliability here is verified from our own scheduled checks; use the 30-day bars above to see which has been steadier lately.

Which is faster, Automatic Weather Stations or Groundhog Day API?

Groundhog Day API has the lower median latency in our checks — Automatic Weather Stations responds in 986 ms versus Groundhog Day API at 262 ms (P50). Tail latency (P95) is in the table above; for most workloads the median is the number that shapes how the API feels.

Do Automatic Weather Stations and Groundhog Day API need an API key?

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

Can I call Automatic Weather Stations and Groundhog Day API from the browser?

Yes — both Automatic Weather Stations and Groundhog Day API 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 Groundhog Day API free for commercial use?

Automatic Weather Stations has unclear commercial terms, and Groundhog Day API 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.