openSenseMap vs Weather Underground API
Same instrument, two spec sheets — measured, not claimed.
openSenseMap vs Weather Underground API: common questions
Which is more reliable, openSenseMap or Weather Underground API?
On our scheduled checks, Weather Underground API leads on measured uptime — openSenseMap at 90.2% versus Weather Underground API 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, openSenseMap or Weather Underground API?
Weather Underground API has the lower median latency in our checks — openSenseMap responds in 655 ms versus Weather Underground API at 104 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 openSenseMap and Weather Underground API need an API key?
openSenseMap needs no key, while Weather Underground API requires a free API key. If you want to start calling without signup, reach for openSenseMap first.
Can I call openSenseMap and Weather Underground API from the browser?
Yes — both openSenseMap and Weather Underground 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 openSenseMap and Weather Underground API free for commercial use?
openSenseMap has unclear commercial terms, and Weather Underground 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.