Wallace, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.9 °C (low) to 17.8 °C (high). Annual precipitation averages 1263.1 Millimeters. Wallace is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.1 °C | 4.3 °C | 98.55 mm |
| February | -5.2 °C | 6.3 °C | 88.39 mm |
| March | -1.7 °C | 11.4 °C | 107.95 mm |
| April | 3.8 °C | 18.9 °C | 103.38 mm |
| May | 9.2 °C | 23.4 °C | 125.22 mm |
| June | 14.1 °C | 27.4 °C | 123.44 mm |
| July | 16.4 °C | 29.2 °C | 140.21 mm |
| August | 15.7 °C | 28.6 °C | 104.9 mm |
| September | 11.7 °C | 25.6 °C | 95.5 mm |
| October | 4.9 °C | 19.1 °C | 88.39 mm |
| November | -0.3 °C | 12.3 °C | 85.09 mm |
| December | -3.6 °C | 6.6 °C | 102.11 mm |
| Annual | 4.9 °C | 17.8 °C | 1263.13 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |