Kopperston, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 6 °C (low) to 17.6 °C (high). Annual precipitation averages 1371.9 Millimeters. Kopperston is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.4 °C | 5.3 °C | 103.12 mm |
| February | -3.3 °C | 7.5 °C | 98.55 mm |
| March | 0.2 °C | 12.1 °C | 145.8 mm |
| April | 5.2 °C | 18.9 °C | 121.92 mm |
| May | 10.3 °C | 22.9 °C | 146.05 mm |
| June | 14.7 °C | 26.4 °C | 120.9 mm |
| July | 16.7 °C | 27.9 °C | 149.1 mm |
| August | 15.9 °C | 27.6 °C | 111.51 mm |
| September | 12.6 °C | 24.5 °C | 86.61 mm |
| October | 5.8 °C | 18.6 °C | 79.25 mm |
| November | 0.6 °C | 12.6 °C | 87.38 mm |
| December | -2.3 °C | 7.2 °C | 121.67 mm |
| Annual | 6 °C | 17.6 °C | 1371.86 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 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 |