| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 9a: 20°F to 25°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F |
| 1990 Hardiness Zone: | Zone 8b: 15F to 20F |
| Average First Frost Date: | Oct. 21 - Oct. 31 |
| Average Last Frost Date: | May 21 - May 31 |
| Koppen-Geiger Climate Zone: | Csb - Warm-Summer Mediterranean Climate |
| Ecoregion: | |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 96041 - Hayfork, CA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 34 | 35 | 41 | 47 | 52 | 51 | 47 | 40 | 35 | 31 | 40 |
| Avg Max Temp (°F) | 48 | 53 | 58 | 65 | 74 | 82 | 91 | 91 | 86 | 72 | 54 | 47 | 68 |
| Avg Precip (In.) | 6.6 | 5.85 | 5.44 | 1.96 | 1.25 | .61 | .26 | .34 | 1.01 | 2.21 | 5.18 | 5.92 | 36.64 |