swelter — this deploy's data: CC BY 4.0 (Copernicus CAMS via Open-Meteo)
Real hourly readings for California cities from the Copernicus Atmosphere Monitoring Service (CAMS) via Open-Meteo — atmospheric model data, not physical sensors, and not swelter-calibrated.
License URL: https://open-meteo.com/en/license
swelter source code is Apache-2.0 (see /LICENSE).