California Climate Data

NOAA 30-year climate normals for all 58 counties.

State Avg Temp

58.7°F

Hottest County

Imperial County

73.7°F avg

Coldest County

Mono County

43.9°F avg

Wettest County

Del Norte County

74.6" precip

All California Counties

Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.

Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.

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