Clarksburg, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.1 °F (low) to 64.1 °F (high). Annual precipitation averages 48.2 Inches. Clarksburg 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 | 21.2 °F | 40.0 °F | 3.65 in. |
| February | 22.7 °F | 43.2 °F | 3.48 in. |
| March | 29.2 °F | 52.9 °F | 4.2 in. |
| April | 39.1 °F | 66.2 °F | 3.96 in. |
| May | 49.0 °F | 74.4 °F | 4.83 in. |
| June | 57.8 °F | 81.8 °F | 4.7 in. |
| July | 62.2 °F | 84.8 °F | 5.33 in. |
| August | 60.8 °F | 83.6 °F | 4.13 in. |
| September | 53.5 °F | 77.8 °F | 3.51 in. |
| October | 41.1 °F | 65.9 °F | 3.32 in. |
| November | 31.4 °F | 54.2 °F | 3.27 in. |
| December | 25.6 °F | 44.0 °F | 3.81 in. |
| Annual | 41.1 °F | 64.1 °F | 48.19 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 | Dfb - Humid Continental Mild Summer, Wet All Year |