Wytheville, Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.1 °C (low) to 17.8 °C (high). Annual precipitation averages 1063.5 Millimeters. Wytheville is located in USDA Plant Hardiness Zone 7a. 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 | -5 °C | 5.8 °C | 80.77 mm |
| February | -3.9 °C | 7.8 °C | 72.9 mm |
| March | -0.5 °C | 12.4 °C | 92.2 mm |
| April | 4.2 °C | 18.2 °C | 96.01 mm |
| May | 9.3 °C | 22.6 °C | 109.98 mm |
| June | 13.7 °C | 26.4 °C | 107.95 mm |
| July | 15.9 °C | 28.3 °C | 101.35 mm |
| August | 15.1 °C | 27.7 °C | 93.73 mm |
| September | 11.6 °C | 24.7 °C | 86.61 mm |
| October | 4.9 °C | 19.2 °C | 75.95 mm |
| November | -0.5 °C | 13.2 °C | 65.02 mm |
| December | -3.3 °C | 7.8 °C | 81.03 mm |
| Annual | 5.1 °C | 17.8 °C | 1063.5 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |