Haleyville, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10 °C (low) to 21.6 °C (high). Annual precipitation averages 1657.3 Millimeters. Haleyville 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 | -0.8 °C | 10.1 °C | 151.64 mm |
| February | 0.9 °C | 12.3 °C | 153.67 mm |
| March | 4.9 °C | 17.2 °C | 144.02 mm |
| April | 9.4 °C | 22.1 °C | 152.65 mm |
| May | 14.5 °C | 25.9 °C | 143.76 mm |
| June | 18.6 °C | 29.9 °C | 136.14 mm |
| July | 20.4 °C | 31.6 °C | 131.32 mm |
| August | 20 °C | 31.4 °C | 126.49 mm |
| September | 16.6 °C | 28.7 °C | 112.78 mm |
| October | 10.2 °C | 22.9 °C | 109.47 mm |
| November | 4.2 °C | 16.3 °C | 124.97 mm |
| December | 1.1 °C | 11.3 °C | 170.43 mm |
| Annual | 10 °C | 21.6 °C | 1657.34 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 |