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AviationWeather vs ColorfulClouds

Same instrument, two spec sheets — measured, not claimed.

APIAviationWeatherNEW—ColorfulCloudsREACHABLE—
Uptime · 30d
Uptime · 90d—%—%
Uptime · 30d—%—%
P50 · ms——
P95 · ms——
AuthnoneapiKey
CORSnono
HTTPSyesyes
Card requirednono
Commercial useyesunclear
Data licensePublic domain (U.S. Government / NOAA)Unverified
Free tierFree, no keyFree tier — API key required
Rate limitUnpublished (NWS requests reasonable use)Unpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

AviationWeather vs ColorfulClouds: common questions

Which is more reliable, AviationWeather or ColorfulClouds?

On our scheduled checks, ColorfulClouds leads on measured uptime — AviationWeather at —% versus ColorfulClouds 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 AviationWeather and ColorfulClouds need an API key?

AviationWeather needs no key, while ColorfulClouds requires a free API key. If you want to start calling without signup, reach for AviationWeather first.

Can I call AviationWeather and ColorfulClouds from the browser?

Neither sends browser-friendly CORS headers reliably, so call AviationWeather and ColorfulClouds from a server or proxy rather than client-side. The CORS and HTTPS rows above show exactly what we detected for each.

Are AviationWeather and ColorfulClouds free for commercial use?

AviationWeather allows commercial use on its free tier, and ColorfulClouds 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.