Carlton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 53.6 °F (low) to 77.2 °F (high). Annual precipitation averages 61.5 Inches. Carlton is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 36.3 °F | 60.0 °F | 5.76 in. |
| February | 39.6 °F | 64.1 °F | 5.13 in. |
| March | 45.3 °F | 71.2 °F | 5.56 in. |
| April | 51.8 °F | 77.4 °F | 4.65 in. |
| May | 60.9 °F | 84.5 °F | 4.49 in. |
| June | 67.4 °F | 89.5 °F | 6.03 in. |
| July | 71.2 °F | 91.0 °F | 6.22 in. |
| August | 70.3 °F | 90.6 °F | 5.33 in. |
| September | 65.8 °F | 86.9 °F | 4.58 in. |
| October | 53.5 °F | 79.2 °F | 3.57 in. |
| November | 42.7 °F | 69.6 °F | 4.51 in. |
| December | 38.4 °F | 62.4 °F | 5.71 in. |
| Annual | 53.6 °F | 77.2 °F | 61.54 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8a : 10°F to 15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |