# Counties in California by average annual temperature, 2025

All 58 values come from NOAA National Centers for Environmental Information for 2025, so the places are comparable.

- Indicator id: `average_temperature_annual`
- Unit: °F
- Definition: Mean air temperature from January to December, in degrees Fahrenheit: the average of the 12 monthly mean temperatures. NOAA computes it from its climate divisional dataset (nClimDiv): station readings interpolated onto a 5 km grid and averaged over the area.
- Source: NOAA National Centers for Environmental Information, NOAA Climate at a Glance, January to December average temperature, counties (https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping)
- Publisher page: https://invokely.ai/en/publishers/noaa-ncei
- Retrieved: 2026-10-12
- Citation: NOAA National Centers for Environmental Information, Climate at a Glance. NOAA Climate at a Glance, January to December average temperature, counties. From the NOAA Monthly U.S. Climate Divisional Database (nClimDiv), doi:10.7289/V5M32STR. https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/mapping. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/average-annual-temperature/california-counties

| Rank | Place | °F |
|---:|---|---:|
| 1 | Imperial County | 75.8 |
| 2 | Riverside County | 70.2 |
| 3 | San Bernardino County | 68.4 |
| 4 | Kings County | 65.3 |
| 5 | Orange County | 64.9 |
| 6 | San Diego County | 64.2 |
| 7 | Sutter County | 64.1 |
| 8 | Kern County | 63.5 |
| 9 | Merced County | 63.4 |
| 10 | San Joaquin County | 63.1 |
| 11 | Inyo County | 63 |
| 12 | Los Angeles County | 62.9 |
| 12 | Yolo County | 62.9 |
| 14 | Colusa County | 62.8 |
| 15 | Sacramento County | 62.7 |
| 15 | Stanislaus County | 62.7 |
| 17 | Yuba County | 62.4 |
| 18 | Glenn County | 62 |
| 19 | Solano County | 61.7 |
| 20 | Butte County | 61.6 |
| 21 | Tehama County | 60.9 |
| 22 | Contra Costa County | 60.8 |
| 22 | San Luis Obispo County | 60.8 |
| 24 | Napa County | 60.3 |
| 25 | Calaveras County | 60.2 |
| 25 | San Benito County | 60.2 |
| 27 | Alameda County | 60 |
| 28 | Amador County | 59.8 |
| 29 | Monterey County | 59.7 |
| 30 | Santa Barbara County | 59.5 |
| 31 | Santa Clara County | 59.3 |
| 32 | Lake County | 58.7 |
| 33 | Ventura County | 58.5 |
| 34 | Madera County | 57.9 |
| 35 | Santa Cruz County | 57.8 |
| 36 | Shasta County | 57.7 |
| 37 | Sonoma County | 57.6 |
| 38 | San Francisco County | 57.5 |
| 39 | San Mateo County | 57.4 |
| 40 | Fresno County | 57.3 |
| 40 | Mariposa County | 57.3 |
| 42 | Marin County | 56.7 |
| 42 | Mendocino County | 56.7 |
| 44 | Tulare County | 56.1 |
| 45 | Humboldt County | 55.6 |
| 46 | El Dorado County | 55.5 |
| 47 | Placer County | 55.1 |
| 47 | Trinity County | 55.1 |
| 49 | Del Norte County | 54.3 |
| 50 | Nevada County | 54.1 |
| 51 | Tuolumne County | 51.9 |
| 52 | Siskiyou County | 51.3 |
| 53 | Plumas County | 50 |
| 54 | Lassen County | 49.7 |
| 54 | Modoc County | 49.7 |
| 56 | Sierra County | 49.3 |
| 57 | Mono County | 46.3 |
| 58 | Alpine County | 45.9 |