Sumiton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 50.4 °F (low) to 73.9 °F (high). Annual precipitation averages 58.6 Inches. Sumiton 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 | 31.7 °F | 53.9 °F | 5.72 in. |
| February | 34.6 °F | 58.2 °F | 5.29 in. |
| March | 41.5 °F | 66.6 °F | 6.07 in. |
| April | 48.6 °F | 74.9 °F | 5.17 in. |
| May | 57.9 °F | 81.6 °F | 4.72 in. |
| June | 65.8 °F | 87.8 °F | 4.77 in. |
| July | 69.1 °F | 90.8 °F | 5.06 in. |
| August | 68.4 °F | 90.4 °F | 3.82 in. |
| September | 62.5 °F | 85.9 °F | 4.67 in. |
| October | 50.1 °F | 75.9 °F | 3.43 in. |
| November | 39.8 °F | 64.8 °F | 4.62 in. |
| December | 34.8 °F | 56.3 °F | 5.28 in. |
| Annual | 50.4 °F | 73.9 °F | 58.62 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 |