Wilton, Alabama has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 10.7 °C (low) to 24 °C (high). Annual precipitation averages 1464.6 Millimeters. Wilton is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.6 °C | 13.2 °C | 137.16 mm |
| February | 2.2 °C | 15.7 °C | 148.34 mm |
| March | 5.8 °C | 20.2 °C | 140.97 mm |
| April | 9.7 °C | 24.4 °C | 132.59 mm |
| May | 14.8 °C | 28.4 °C | 108.2 mm |
| June | 19.1 °C | 31.6 °C | 123.95 mm |
| July | 21 °C | 33.2 °C | 128.78 mm |
| August | 20.7 °C | 32.9 °C | 106.43 mm |
| September | 17.4 °C | 30.4 °C | 97.79 mm |
| October | 10.8 °C | 25 °C | 81.28 mm |
| November | 4.8 °C | 18.9 °C | 117.09 mm |
| December | 1.9 °C | 14.3 °C | 141.99 mm |
| Annual | 10.7 °C | 24 °C | 1464.57 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |