| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F 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: | Jan. 21 - Jan. 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 94578 - San Leandro, 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 | 56 | 56 | 53 | 46 | 42 | 49 |
| Avg Max Temp (°F) | 57 | 60 | 62 | 66 | 69 | 72 | 74 | 75 | 75 | 72 | 63 | 57 | 67 |
| Avg Precip (In.) | 4.8 | 4.33 | 3.82 | 1.51 | .67 | .15 | .06 | .09 | .32 | 1.36 | 3.32 | 3.43 | 23.87 |