| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 10a: 30°F to 35°F Zone 9b: 25°F to 30°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F 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: | Nov. 21 - Nov. 30 |
| Average Last Frost Date: | Mar. 11 - Mar. 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 93927 - Greenfield, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 37 | 40 | 41 | 43 | 46 | 50 | 52 | 52 | 51 | 46 | 40 | 36 | 44 |
| Avg Max Temp (°F) | 62 | 65 | 68 | 73 | 77 | 82 | 85 | 86 | 85 | 79 | 68 | 62 | 74 |
| Avg Precip (In.) | 2.23 | 2.24 | 2.27 | .66 | .16 | .06 | .04 | .07 | .25 | .52 | 1.21 | 1.54 | 11.23 |