Carlton, Georgia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.7 °C (low) to 22.9 °C (high). Annual precipitation averages 1222.3 Millimeters. Carlton is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -0.4 °C | 12.4 °C | 115.57 mm |
| February | 0.9 °C | 14.4 °C | 110.24 mm |
| March | 4.3 °C | 18.7 °C | 114.81 mm |
| April | 8.6 °C | 23.2 °C | 87.63 mm |
| May | 13.7 °C | 27.2 °C | 84.33 mm |
| June | 18.5 °C | 30.8 °C | 111.25 mm |
| July | 20.6 °C | 32.6 °C | 96.27 mm |
| August | 20 °C | 31.7 °C | 108.71 mm |
| September | 16.6 °C | 28.9 °C | 91.19 mm |
| October | 9.7 °C | 23.4 °C | 87.12 mm |
| November | 3.5 °C | 18.1 °C | 93.47 mm |
| December | 0.8 °C | 13.6 °C | 121.67 mm |
| Annual | 9.7 °C | 22.9 °C | 1222.26 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |