Weather API Powered by Proprietary Technology.
Tomorrow API is a free Weather API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
Unlock Space Data Through Next-Generation Premium Features Learn More Improve Business Operations Whether you’re aiming to ensure employee safety, alert customers of future weather events, or incorporate more reliable weather data in your own software application, the Tomorrow.io Weather API offers…
Details from docs.tomorrow.io.

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The Tomorrow API is provided by Tomorrow.io APIs (docs.tomorrow.io). Unlock Space Data Through Next-Generation Premium Features Learn More Improve Business Operations Whether you’re aiming to ensure employee safety, alert customers of future weather events, or incorporate more reliable weather data in your own software application, the Tomorrow.io Weather API offers…
Yes. The Tomorrow API is listed in the Weather category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The Tomorrow API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the Tomorrow API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The Tomorrow API is served over HTTPS, so it's safe to use in production.