| 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 7a: 0F to 5F | |
| Average First Frost Date: | November 1 - 10 | |
| Average Last Frost Date: | April 1 - 10 | |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate | |
| Ecoregion: | 45a - Southern Inner Piedmont | |
| Current Drought Status: | Exceptional Drought | |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 30082 - Smyrna, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 39 | 46 | 55 | 63 | 67 | 66 | 60 | 48 | 40 | 33 | 48 |
| Avg Max Temp (°F) | 50 | 55 | 64 | 72 | 79 | 85 | 88 | 87 | 82 | 72 | 63 | 53 | 71 |
| Avg Precip (In.) | 5.55 | 4.94 | 5.84 | 4.17 | 4.22 | 3.94 | 4.74 | 4.09 | 3.77 | 3.28 | 4.08 | 4.17 | 52.8 |