Brantleyville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52 °F (low) to 74.6 °F (high). Annual precipitation averages 57.2 Inches. Brantleyville is located in USDA Plant Hardiness Zone 8b. 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 | 33.9 °F | 55.3 °F | 5.33 in. |
| February | 36.8 °F | 59.7 °F | 5.72 in. |
| March | 43.3 °F | 67.5 °F | 5.56 in. |
| April | 50.3 °F | 75.2 °F | 5.22 in. |
| May | 59.3 °F | 82.3 °F | 4.25 in. |
| June | 66.9 °F | 88.2 °F | 4.77 in. |
| July | 70.1 °F | 91.2 °F | 4.68 in. |
| August | 69.5 °F | 90.8 °F | 4.44 in. |
| September | 64.0 °F | 86.4 °F | 4.07 in. |
| October | 52.3 °F | 76.3 °F | 3.27 in. |
| November | 41.5 °F | 65.5 °F | 4.55 in. |
| December | 36.2 °F | 57.3 °F | 5.34 in. |
| Annual | 52 °F | 74.6 °F | 57.2 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 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 |