| 2023 Hardiness Zone: | 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. 1 - Nov. 10 |
| Average Last Frost Date: | Mar. 21 - Mar. 31 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 45b - Southern Outer Piedmont |
| Heat Zone Days: | 91 - 120 days Over 86°F |
Annual Climate Data for ZIP Code 30220 - Grantville, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 34 | 40 | 47 | 56 | 64 | 68 | 67 | 61 | 49 | 41 | 34 | 49 |
| Avg Max Temp (°F) | 54 | 59 | 67 | 74 | 81 | 87 | 90 | 89 | 83 | 74 | 65 | 56 | 73 |
| Avg Precip (In.) | 5.32 | 5 | 5.83 | 4.19 | 3.89 | 3.89 | 4.78 | 3.81 | 3.37 | 2.95 | 4.1 | 4.45 | 51.6 |