| 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: | Dec. 11 - Dec. 20 |
| Average Last Frost Date: | Mar. 1 - Mar. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 95466 - Philo, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 40 | 41 | 42 | 45 | 48 | 51 | 51 | 49 | 45 | 41 | 38 | 44 |
| Avg Max Temp (°F) | 56 | 59 | 61 | 66 | 71 | 77 | 82 | 81 | 79 | 72 | 62 | 56 | 68 |
| Avg Precip (In.) | 8.85 | 7.39 | 6.38 | 2.72 | 1.19 | .28 | .08 | .25 | .7 | 2.15 | 5.41 | 7.1 | 42.5 |