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Automatic Weather Stations vs Hong Kong Observatory

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

APIAutomatic Weather StationsHEALTHY87Hong Kong ObservatoryHEALTHY60
Uptime · 30d
Uptime · 90d100%100%
Uptime · 30d100%100%
P50 · ms9861415
P95 · ms19493670
Authnonenone
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedHKO open data (see terms of use)
Free tierFree — limits not publishedFree, no key
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Automatic Weather Stations vs Hong Kong Observatory: common questions

Which is more reliable, Automatic Weather Stations or Hong Kong Observatory?

Both are neck-and-neck — Automatic Weather Stations and Hong Kong Observatory 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 Hong Kong Observatory?

Automatic Weather Stations has the lower median latency in our checks — Automatic Weather Stations responds in 986 ms versus Hong Kong Observatory at 1415 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 Hong Kong Observatory need an API key?

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

Can I call Automatic Weather Stations and Hong Kong Observatory from the browser?

Yes — both Automatic Weather Stations and Hong Kong Observatory 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 Hong Kong Observatory free for commercial use?

Automatic Weather Stations has unclear commercial terms, and Hong Kong Observatory 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.