| 2023 Hardiness Zone: | Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Frost Rare |
| Average Last Frost Date: | Frost Rare |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 94580 - San Lorenzo, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 42 | 45 | 46 | 48 | 51 | 54 | 56 | 57 | 56 | 53 | 46 | 41 | 50 |
| Avg Max Temp (°F) | 57 | 60 | 62 | 66 | 69 | 72 | 74 | 75 | 75 | 72 | 63 | 57 | 67 |
| Avg Precip (In.) | 4.35 | 3.83 | 3.39 | 1.31 | .59 | .13 | .04 | .08 | .28 | 1.24 | 2.87 | 3.04 | 21.15 |