Blacksville, West Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 63.2 °F (high). Annual precipitation averages 46.1 Inches. Blacksville 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 | 20.7 °F | 39.0 °F | 3.62 in. |
| February | 22.3 °F | 42.2 °F | 3.07 in. |
| March | 28.8 °F | 51.6 °F | 3.84 in. |
| April | 38.4 °F | 64.8 °F | 3.83 in. |
| May | 48.6 °F | 73.5 °F | 4.59 in. |
| June | 57.4 °F | 80.6 °F | 4.57 in. |
| July | 61.6 °F | 84.1 °F | 4.84 in. |
| August | 60.0 °F | 83.1 °F | 3.97 in. |
| September | 52.9 °F | 77.4 °F | 3.65 in. |
| October | 41.2 °F | 65.6 °F | 3.26 in. |
| November | 31.9 °F | 53.5 °F | 3.22 in. |
| December | 25.6 °F | 42.9 °F | 3.65 in. |
| Annual | 40.8 °F | 63.2 °F | 46.11 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |