| 2023 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 2012 Hardiness Zone: | Zone 9b: 25°F to 30°F |
| 1990 Hardiness Zone: | Zone 9b: 25F to 30F |
| Average First Frost Date: | Jan. 11 - Jan. 20 |
| 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 95121 - San Jose, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 40 | 43 | 44 | 46 | 50 | 54 | 57 | 57 | 56 | 51 | 44 | 40 | 49 |
| Avg Max Temp (°F) | 59 | 63 | 66 | 71 | 76 | 82 | 86 | 86 | 84 | 77 | 65 | 59 | 73 |
| Avg Precip (In.) | 4.42 | 3.93 | 3.69 | 1.29 | .48 | .12 | .07 | .09 | .31 | 1.17 | 2.55 | 2.76 | 20.9 |