| 2023 Hardiness Zone: | Zone 8a: 10°F to 15°F |
| 2012 Hardiness Zone: | 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: | Apr. 11 - Apr. 20 |
| Koppen-Geiger Climate Zone: | Cfa - Humid Subtropical Climate |
| Ecoregion: | 45a - Southern Inner Piedmont |
| Heat Zone Days: | 61 - 90 days Over 86°F |
Annual Climate Data for ZIP Code 30141 - Hiram, GA | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg Min Temp (°F) | 30 | 32 | 39 | 45 | 54 | 62 | 67 | 66 | 60 | 47 | 39 | 32 | 48 |
| Avg Max Temp (°F) | 50 | 55 | 64 | 72 | 79 | 86 | 89 | 88 | 82 | 73 | 63 | 53 | 71 |
| Avg Precip (In.) | 5.65 | 4.98 | 5.88 | 4.39 | 4.41 | 4.05 | 4.66 | 4.02 | 3.73 | 3.26 | 4.15 | 4.25 | 53.42 |