| 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: | Jan. 11 - Jan. 20 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 94553 - Martinez, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 43 | 45 | 49 | 53 | 55 | 55 | 53 | 49 | 43 | 38 | 47 |
| Avg Max Temp (°F) | 54 | 60 | 63 | 70 | 76 | 82 | 85 | 86 | 82 | 75 | 63 | 54 | 71 |
| Avg Precip (In.) | 4.62 | 3.79 | 2.78 | 1.4 | .74 | .13 | .05 | .08 | .24 | 1.25 | 2.33 | 3.19 | 20.6 |