Summersville, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.8 °F (low) to 62.2 °F (high). Annual precipitation averages 51 Inches. Summersville 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 | 20.1 °F | 39.9 °F | 3.44 in. |
| February | 22.2 °F | 43.1 °F | 3.19 in. |
| March | 28.4 °F | 51.6 °F | 4.37 in. |
| April | 38.0 °F | 64.0 °F | 3.94 in. |
| May | 47.5 °F | 71.7 °F | 5.47 in. |
| June | 56.0 °F | 78.0 °F | 5.15 in. |
| July | 59.8 °F | 81.2 °F | 6.17 in. |
| August | 58.4 °F | 80.2 °F | 4.83 in. |
| September | 52.0 °F | 75.0 °F | 4.07 in. |
| October | 40.3 °F | 64.5 °F | 3.36 in. |
| November | 30.1 °F | 53.3 °F | 3.14 in. |
| December | 24.9 °F | 43.8 °F | 3.87 in. |
| Annual | 39.8 °F | 62.2 °F | 51 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |