Glen Wilton, Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.6 °C (low) to 19.9 °C (high). Annual precipitation averages 1021.6 Millimeters. Glen Wilton is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.9 °C | 7.3 °C | 73.66 mm |
| February | -2.9 °C | 9.8 °C | 69.85 mm |
| March | 0.4 °C | 14.4 °C | 87.63 mm |
| April | 5.6 °C | 20.8 °C | 91.95 mm |
| May | 10.9 °C | 25 °C | 103.38 mm |
| June | 15.5 °C | 28.8 °C | 104.9 mm |
| July | 17.8 °C | 30.8 °C | 94.49 mm |
| August | 17.2 °C | 29.9 °C | 77.22 mm |
| September | 13.6 °C | 26.6 °C | 86.87 mm |
| October | 6.8 °C | 20.9 °C | 74.93 mm |
| November | 0.8 °C | 14.9 °C | 71.88 mm |
| December | -2.4 °C | 9.4 °C | 84.84 mm |
| Annual | 6.6 °C | 19.9 °C | 1021.6 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |