| 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 10b: 35°F to 40°F Zone 9a: 20°F to 25°F Zone 10a: 30°F to 35°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: | 15 - 30 days Over 86°F |
Annual Climate Data for ZIP Code 95005 - Ben Lomond, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 35 | 38 | 39 | 40 | 44 | 47 | 49 | 49 | 48 | 44 | 39 | 35 | 42 |
| Avg Max Temp (°F) | 61 | 63 | 66 | 72 | 76 | 81 | 84 | 85 | 83 | 78 | 67 | 62 | 73 |
| Avg Precip (In.) | 10.03 | 9.13 | 6.84 | 2.7 | .99 | .2 | .11 | .15 | .46 | 2.11 | 5.94 | 6.85 | 45.5 |