| 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. 11 - Dec. 20 |
| Average Last Frost Date: | Feb. 21 - Feb. 29 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 31 - 45 days Over 86°F |
Annual Climate Data for ZIP Code 95037 - Morgan Hill, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 38 | 41 | 43 | 45 | 49 | 52 | 55 | 55 | 53 | 49 | 42 | 37 | 47 |
| Avg Max Temp (°F) | 60 | 64 | 67 | 72 | 77 | 83 | 86 | 86 | 84 | 78 | 67 | 60 | 74 |
| Avg Precip (In.) | 5.35 | 5.14 | 4.61 | 1.61 | .55 | .13 | .07 | .1 | .36 | 1.25 | 3.32 | 3.68 | 26.17 |