| 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. 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 30032 - Decatur, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 31 | 33 | 40 | 47 | 56 | 64 | 68 | 67 | 62 | 49 | 41 | 34 | 49 |
| Avg Max Temp (°F) | 51 | 56 | 64 | 72 | 79 | 86 | 89 | 87 | 82 | 73 | 63 | 54 | 71 |
| Avg Precip (In.) | 5.46 | 4.83 | 5.67 | 4.01 | 4.15 | 3.82 | 4.68 | 3.97 | 3.77 | 3.29 | 4.07 | 4.11 | 51.83 |