| 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. 1 - Jan. 10 |
| Average Last Frost Date: | Feb. 1 - Feb. 10 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 95139 - San Jose, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 42 | 43 | 45 | 49 | 54 | 57 | 57 | 55 | 50 | 43 | 39 | 48 |
| Avg Max Temp (°F) | 58 | 62 | 65 | 70 | 76 | 82 | 86 | 86 | 84 | 77 | 65 | 58 | 72 |
| Avg Precip (In.) | 5.4 | 5.07 | 4.29 | 1.68 | .62 | .11 | .07 | .1 | .35 | 1.36 | 3.25 | 3.65 | 25.94 |