| 2023 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 2012 Hardiness Zone: | Zone 9a: 20°F to 25°F Zone 9b: 25°F to 30°F | |
| 1990 Hardiness Zone: | Zone 9a: 20F to 25F | |
| Average First Frost Date: | Jan. 11 - Jan. 20 | |
| Average Last Frost Date: | Jan. 21 - Jan. 31 | |
| Koppen-Geiger Climate Zone: | Csa - Hot-Summer Mediterranean Climate | |
| Ecoregion: | ||
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 95327 - Jamestown, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 33 | 35 | 37 | 41 | 46 | 51 | 57 | 56 | 51 | 44 | 36 | 32 | 43 |
| Avg Max Temp (°F) | 55 | 59 | 62 | 69 | 78 | 87 | 95 | 94 | 88 | 78 | 63 | 56 | 74 |
| Avg Precip (In.) | 5.84 | 5.19 | 5.01 | 2.42 | 1.21 | .25 | .08 | .1 | .49 | 1.65 | 3.44 | 4.15 | 29.84 |