| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F 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: | Jan. 21 - Jan. 31 |
| 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 94611 - Oakland, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 41 | 44 | 45 | 47 | 50 | 53 | 55 | 55 | 55 | 52 | 46 | 41 | 48 |
| Avg Max Temp (°F) | 55 | 59 | 62 | 66 | 69 | 74 | 76 | 77 | 76 | 72 | 62 | 55 | 67 |
| Avg Precip (In.) | 5.67 | 4.73 | 4.43 | 1.7 | .86 | .15 | .06 | .1 | .35 | 1.43 | 3.91 | 4.02 | 27.41 |