| 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 |
| 1990 Hardiness Zone: | Zone 7b: 5F to 10F |
| Average First Frost Date: | Nov. 11 - Nov. 20 |
| Average Last Frost Date: | Apr. 1 - Apr. 10 |
| 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 30223 - Griffin, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 34 | 41 | 48 | 56 | 64 | 68 | 67 | 61 | 49 | 41 | 34 | 50 |
| Avg Max Temp (°F) | 53 | 58 | 66 | 73 | 80 | 87 | 90 | 88 | 83 | 74 | 65 | 56 | 73 |
| Avg Precip (In.) | 5.25 | 4.66 | 5.55 | 4.01 | 3.81 | 3.84 | 4.9 | 4.1 | 3.38 | 2.91 | 3.85 | 4.28 | 50.53 |