| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°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. 1 - Dec. 10 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 94508 - Angwin, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 39 | 40 | 43 | 47 | 51 | 55 | 54 | 53 | 49 | 41 | 37 | 46 |
| Avg Max Temp (°F) | 54 | 57 | 60 | 67 | 74 | 82 | 87 | 86 | 82 | 74 | 60 | 54 | 70 |
| Avg Precip (In.) | 8.93 | 7.99 | 6.46 | 2.46 | 1.28 | .29 | .05 | .12 | .69 | 2.32 | 5.72 | 6.5 | 42.83 |