| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F | |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F | |
| Average First Frost Date: | Nov. 1 - Nov. 10 | |
| Average Last Frost Date: | Apr. 11 - Apr. 20 | |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 91963 - Potrero, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 36 | 38 | 41 | 46 | 50 | 56 | 57 | 54 | 46 | 38 | 34 | 44 |
| Avg Max Temp (°F) | 64 | 65 | 66 | 72 | 77 | 86 | 93 | 94 | 89 | 80 | 71 | 65 | 77 |
| Avg Precip (In.) | 3.37 | 3.16 | 3.26 | 1.07 | .38 | .09 | .26 | .48 | .4 | .72 | 1.39 | 1.9 | 16.5 |