Carrollton, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.2 °F (low) to 71.7 °F (high). Annual precipitation averages 54.2 Inches. Carrollton is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 31.9 °F | 52.5 °F | 5.09 in. |
| February | 34.9 °F | 56.7 °F | 5.16 in. |
| March | 40.9 °F | 64.7 °F | 5.5 in. |
| April | 48.3 °F | 72.6 °F | 4.51 in. |
| May | 57.5 °F | 79.4 °F | 3.85 in. |
| June | 65.3 °F | 85.4 °F | 4.31 in. |
| July | 68.8 °F | 88.2 °F | 4.43 in. |
| August | 68.1 °F | 87.5 °F | 3.97 in. |
| September | 61.9 °F | 82.3 °F | 4.13 in. |
| October | 50.4 °F | 73.1 °F | 3.56 in. |
| November | 39.6 °F | 63.0 °F | 4.48 in. |
| December | 34.6 °F | 54.9 °F | 5.2 in. |
| Annual | 50.2 °F | 71.7 °F | 54.19 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |