| 2023 Hardiness Zone: | Zone 8b: 15°F to 20°F Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | Zone 8a: 10°F to 15°F Zone 7b: 5°F to 10°F |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 45b - Southern Outer Piedmont |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 30549 - Jefferson, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 33 | 39 | 46 | 55 | 63 | 67 | 66 | 61 | 48 | 40 | 33 | 48 |
| Avg Max Temp (°F) | 51 | 56 | 64 | 73 | 80 | 86 | 89 | 88 | 82 | 73 | 63 | 54 | 72 |
| Avg Precip (In.) | 5.54 | 4.61 | 5.67 | 3.86 | 4.16 | 4.06 | 4.13 | 3.93 | 3.84 | 3.88 | 4.07 | 4.1 | 51.85 |