US Weather vs Weatherstack
Same instrument, two spec sheets — measured, not claimed.
US Weather vs Weatherstack: common questions
Which is more reliable, US Weather or Weatherstack?
Both are neck-and-neck — US Weather and Weatherstack 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, US Weather or Weatherstack?
US Weather has the lower median latency in our checks — US Weather responds in 223 ms versus Weatherstack at 309 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 US Weather and Weatherstack need an API key?
US Weather needs no key, while Weatherstack requires a free API key. If you want to start calling without signup, reach for US Weather first.
Can I call US Weather and Weatherstack from the browser?
Only US Weather 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 US Weather and Weatherstack free for commercial use?
US Weather allows commercial use on its free tier, 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.