| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Frost Rare |
| Average Last Frost Date: | Jan. 21 - Jan. 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 94803 - El Sobrante, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 44 | 46 | 48 | 51 | 54 | 55 | 56 | 56 | 52 | 47 | 42 | 49 |
| Avg Max Temp (°F) | 56 | 60 | 63 | 66 | 69 | 73 | 75 | 75 | 76 | 72 | 63 | 57 | 67 |
| Avg Precip (In.) | 5.18 | 4.66 | 3.84 | 1.62 | .6 | .15 | .07 | .08 | .31 | 1.37 | 3.59 | 3.55 | 25.02 |