| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Jan. 1 - Jan. 10 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 95693 - Wilton, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 42 | 44 | 47 | 51 | 56 | 59 | 59 | 56 | 50 | 43 | 38 | 49 |
| Avg Max Temp (°F) | 54 | 61 | 66 | 72 | 81 | 88 | 93 | 92 | 88 | 78 | 64 | 54 | 74 |
| Avg Precip (In.) | 3.89 | 3.51 | 3.21 | 1.46 | .68 | .21 | .07 | .06 | .36 | 1.01 | 2.41 | 2.87 | 19.73 |