Carbon Hill, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 49.5 °F (low) to 73.1 °F (high). Annual precipitation averages 61.4 Inches. Carbon Hill 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 | 30.5 °F | 52.5 °F | 5.59 in. |
| February | 33.7 °F | 56.9 °F | 5.83 in. |
| March | 40.3 °F | 65.5 °F | 5.82 in. |
| April | 47.8 °F | 73.9 °F | 6.0 in. |
| May | 57.3 °F | 81.0 °F | 5.02 in. |
| June | 65.2 °F | 87.4 °F | 5.12 in. |
| July | 68.8 °F | 90.2 °F | 5.28 in. |
| August | 67.9 °F | 90.2 °F | 4.42 in. |
| September | 61.5 °F | 85.5 °F | 4.42 in. |
| October | 49.1 °F | 75.3 °F | 3.59 in. |
| November | 38.3 °F | 63.7 °F | 4.44 in. |
| December | 33.6 °F | 55.0 °F | 5.84 in. |
| Annual | 49.5 °F | 73.1 °F | 61.37 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |