IPMA vs wttr.in
Same instrument, two spec sheets — measured, not claimed.
IPMA vs wttr.in: common questions
Which is more reliable, IPMA or wttr.in?
On our scheduled checks, wttr.in leads on measured uptime — IPMA 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 IPMA and wttr.in need an API key?
Neither needs a paid key — IPMA 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 IPMA and wttr.in from the browser?
Yes — both IPMA 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 IPMA and wttr.in free for commercial use?
IPMA 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.