| 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. 21 - Nov. 30 |
| Average Last Frost Date: | Mar. 11 - Mar. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 8 - 14 days Over 86°F |
Annual Climate Data for ZIP Code 95436 - Forestville, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 40 | 42 | 43 | 46 | 49 | 51 | 50 | 49 | 45 | 40 | 36 | 44 |
| Avg Max Temp (°F) | 57 | 62 | 65 | 70 | 75 | 81 | 84 | 84 | 82 | 76 | 65 | 58 | 71 |
| Avg Precip (In.) | 8.64 | 7.64 | 6.1 | 2.25 | 1 | .24 | .08 | .11 | .52 | 2.02 | 5.76 | 6.21 | 40.58 |