Free UV Index API vs wttr.in
Same instrument, two spec sheets — measured, not claimed.
Free UV Index API vs wttr.in: common questions
Which is more reliable, Free UV Index API or wttr.in?
On our scheduled checks, wttr.in leads on measured uptime — Free UV Index API at —% versus wttr.in at —% over 90 days. These are our own probe results, not provider claims; the uptime bars above show the day-by-day record for both.
Do Free UV Index API and wttr.in need an API key?
Neither needs a paid key — Free UV Index API is callable with no signup, and wttr.in is callable with no signup. Both are quick to prototype with; rate limits still apply.
Can I call Free UV Index API and wttr.in from the browser?
Yes — both Free UV Index API and wttr.in 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 Free UV Index API and wttr.in free for commercial use?
Free UV Index API has unclear commercial terms, and wttr.in 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.