Powellton, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6.7 °C (low) to 18.6 °C (high). Annual precipitation averages 1234.2 Millimeters. Powellton is located in USDA Plant Hardiness Zone 7a. 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 | -4.2 °C | 5.9 °C | 86.11 mm |
| February | -3.1 °C | 8 °C | 78.99 mm |
| March | 0.3 °C | 12.9 °C | 110.24 mm |
| April | 5.8 °C | 19.8 °C | 103.12 mm |
| May | 10.9 °C | 23.8 °C | 130.3 mm |
| June | 15.7 °C | 27.6 °C | 121.67 mm |
| July | 17.8 °C | 29.3 °C | 147.57 mm |
| August | 17.3 °C | 28.8 °C | 108.71 mm |
| September | 13.6 °C | 25.9 °C | 91.69 mm |
| October | 6.9 °C | 19.9 °C | 78.74 mm |
| November | 1.2 °C | 13.6 °C | 78.49 mm |
| December | -1.8 °C | 8.1 °C | 98.55 mm |
| Annual | 6.7 °C | 18.6 °C | 1234.18 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 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 | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |