| 2023 Hardiness Zone: | Zone 10b: 35°F to 40°F |
| 2012 Hardiness Zone: | Zone 10b: 35°F to 40°F Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 10a: 30F to 35F |
| 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 94121 - San Francisco, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 44 | 46 | 47 | 48 | 50 | 52 | 54 | 55 | 55 | 53 | 48 | 45 | 50 |
| Avg Max Temp (°F) | 57 | 60 | 60 | 61 | 62 | 64 | 66 | 67 | 67 | 67 | 62 | 58 | 63 |
| Avg Precip (In.) | 4.67 | 4.06 | 3.25 | 1.23 | .54 | .13 | .04 | .1 | .18 | 1.21 | 3.04 | 3.17 | 21.62 |