| 2023 Hardiness Zone: | Zone 6b: -5°F to 0°F Zone 7b: 5°F to 10°F Zone 7a: 0°F to 5°F | |
| 2012 Hardiness Zone: | Zone 6a: -10°F to -5°F Zone 6b: -5°F to 0°F | |
| 1990 Hardiness Zone: | Zone 6b: -5F to 0F | |
| Average First Frost Date: | Oct. 1 - Oct. 10 | |
| Average Last Frost Date: | May 21 - May 31 | |
| Koppen-Geiger Climate Zone: | Cfb - Oceanic Climate | |
| Ecoregion: | 66c - New River Plateau | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | Rare Over 86°F |
Annual Climate Data for ZIP Code 28640 - Jefferson, NC | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 21 | 22 | 29 | 36 | 46 | 53 | 58 | 56 | 50 | 37 | 30 | 23 | 38 |
| Avg Max Temp (°F) | 42 | 45 | 53 | 62 | 70 | 76 | 80 | 79 | 73 | 64 | 54 | 46 | 62 |
| Avg Precip (In.) | 4.1 | 3.82 | 4.81 | 4.16 | 5.07 | 4.54 | 4.49 | 4.22 | 4.13 | 3.64 | 4.12 | 3.35 | 50.46 |