| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F Zone 10a: 30°F to 35°F |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F |
| Average First Frost Date: | Dec. 1 - Dec. 10 |
| Average Last Frost Date: | Feb. 11 - Feb. 20 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 95020 - Gilroy, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 39 | 42 | 44 | 45 | 50 | 53 | 55 | 55 | 54 | 49 | 43 | 38 | 47 |
| Avg Max Temp (°F) | 60 | 64 | 67 | 73 | 78 | 84 | 87 | 87 | 85 | 79 | 67 | 61 | 74 |
| Avg Precip (In.) | 4.32 | 4.11 | 3.64 | 1.19 | .4 | .1 | .06 | .05 | .33 | .93 | 2.54 | 2.99 | 20.66 |