Wilton, Arkansas has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 52.3 °F (low) to 75.2 °F (high). Annual precipitation averages 52.5 Inches. Wilton 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 | 32.8 °F | 54.8 °F | 3.79 in. |
| February | 36.2 °F | 58.9 °F | 4.19 in. |
| March | 43.6 °F | 67.1 °F | 4.96 in. |
| April | 51.1 °F | 75.3 °F | 5.21 in. |
| May | 60.7 °F | 82.2 °F | 5.77 in. |
| June | 68.4 °F | 89.7 °F | 4.19 in. |
| July | 71.7 °F | 93.8 °F | 3.64 in. |
| August | 70.4 °F | 93.7 °F | 3.06 in. |
| September | 63.7 °F | 87.6 °F | 3.86 in. |
| October | 51.8 °F | 77.0 °F | 4.41 in. |
| November | 42.0 °F | 65.3 °F | 4.32 in. |
| December | 35.3 °F | 56.7 °F | 5.12 in. |
| Annual | 52.3 °F | 75.2 °F | 52.52 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 | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |