Blountsville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.8 °C (low) to 22.1 °C (high). Annual precipitation averages 1503.4 Millimeters. Blountsville 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 | -0.6 °C | 10.7 °C | 143.26 mm |
| February | 1 °C | 13.1 °C | 132.08 mm |
| March | 4.7 °C | 17.7 °C | 142.49 mm |
| April | 8.9 °C | 22.4 °C | 134.37 mm |
| May | 13.9 °C | 26.3 °C | 137.67 mm |
| June | 18.4 °C | 30.1 °C | 123.95 mm |
| July | 20.3 °C | 31.6 °C | 117.09 mm |
| August | 19.8 °C | 31.4 °C | 100.84 mm |
| September | 16.4 °C | 28.9 °C | 107.44 mm |
| October | 9.7 °C | 23.3 °C | 98.55 mm |
| November | 3.9 °C | 16.9 °C | 119.63 mm |
| December | 1 °C | 12.2 °C | 146.05 mm |
| Annual | 9.8 °C | 22.1 °C | 1503.42 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |