Hong Kong Observatory vs Weatherstack
Same instrument, two spec sheets — measured, not claimed.
Hong Kong Observatory vs Weatherstack: common questions
Which is more reliable, Hong Kong Observatory or Weatherstack?
On our scheduled checks, Weatherstack leads on measured uptime — Hong Kong Observatory at 98.9% versus Weatherstack at 100% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Which is faster, Hong Kong Observatory or Weatherstack?
Weatherstack has the lower median latency in our checks — Hong Kong Observatory responds in 1678 ms versus Weatherstack at 200 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 Hong Kong Observatory and Weatherstack need an API key?
Hong Kong Observatory needs no key, while Weatherstack requires a free API key. If you want to start calling without signup, reach for Hong Kong Observatory first.
Can I call Hong Kong Observatory and Weatherstack from the browser?
Only Hong Kong Observatory is browser-friendly — it returns CORS headers over HTTPS. Weatherstack needs a server-side call or proxy, so factor that into which one fits a front-end project.
Are Hong Kong Observatory and Weatherstack free for commercial use?
Hong Kong Observatory has unclear commercial terms, and Weatherstack 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.