Kingwood, 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 16.3 °C (high). Annual precipitation averages 1223.8 Millimeters. Kingwood 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 | 3.3 °C | 96.01 mm |
| February | -5.3 °C | 5.2 °C | 88.39 mm |
| March | -1.7 °C | 10 °C | 100.08 mm |
| April | 3.9 °C | 17.1 °C | 105.41 mm |
| May | 9.2 °C | 21.7 °C | 119.13 mm |
| June | 13.8 °C | 25.6 °C | 124.97 mm |
| July | 16 °C | 27.4 °C | 131.57 mm |
| August | 15.3 °C | 26.9 °C | 103.38 mm |
| September | 11.6 °C | 23.9 °C | 88.9 mm |
| October | 5.3 °C | 17.7 °C | 84.07 mm |
| November | 0.2 °C | 11.2 °C | 83.31 mm |
| December | -3.4 °C | 5.7 °C | 98.55 mm |
| Annual | 4.9 °C | 16.3 °C | 1223.77 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 |