| 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 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. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 1 - 7 days Over 86°F |
Annual Climate Data for ZIP Code 95472 - Sebastopol, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 42 | 43 | 46 | 49 | 51 | 51 | 49 | 45 | 40 | 37 | 44 |
| Avg Max Temp (°F) | 57 | 61 | 64 | 69 | 73 | 79 | 82 | 82 | 80 | 76 | 65 | 58 | 70 |
| Avg Precip (In.) | 8.79 | 7.87 | 6.25 | 2.39 | .98 | .24 | .08 | .11 | .55 | 2.17 | 5.83 | 6.26 | 41.5 |