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Open-Meteo Archive vs Weather Underground API

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

APIOpen-Meteo ArchiveDEAD0Weather Underground APIREACHABLE100
Uptime · 30d
Uptime · 90d0.0%100%
Uptime · 30d0.0%100%
P50 · ms—104
P95 · ms—1117
AuthnoneapiKey
CORSyesyes
HTTPSyesyes
Card requirednono
Commercial useunclearunclear
Data licenseUnverifiedUnverified
Free tierFree — limits not publishedFree tier — API key may be required for production
Rate limitUnpublishedUnpublished
In directory since2026-07-052026-07-05
operationalpartialdownno data

Open-Meteo Archive vs Weather Underground API: common questions

Which is more reliable, Open-Meteo Archive or Weather Underground API?

On our scheduled checks, Weather Underground API leads on measured uptime — Open-Meteo Archive at 0.0% 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.

Do Open-Meteo Archive and Weather Underground API need an API key?

Open-Meteo Archive needs no key, while Weather Underground API requires a free API key. If you want to start calling without signup, reach for Open-Meteo Archive first.

Can I call Open-Meteo Archive and Weather Underground API from the browser?

Yes — both Open-Meteo Archive 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 Open-Meteo Archive and Weather Underground API free for commercial use?

Open-Meteo Archive 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.