Tunnelton, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.1 °F (low) to 60.8 °F (high). Annual precipitation averages 54.9 Inches. Tunnelton is located in USDA Plant Hardiness Zone 6b. 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 | 20.5 °F | 37.4 °F | 4.28 in. |
| February | 21.8 °F | 40.8 °F | 3.98 in. |
| March | 28.3 °F | 49.4 °F | 4.64 in. |
| April | 38.4 °F | 62.2 °F | 4.74 in. |
| May | 47.8 °F | 70.3 °F | 5.32 in. |
| June | 56.2 °F | 77.3 °F | 5.58 in. |
| July | 60.0 °F | 80.6 °F | 5.98 in. |
| August | 58.7 °F | 79.7 °F | 4.45 in. |
| September | 52.1 °F | 74.5 °F | 3.92 in. |
| October | 40.9 °F | 63.4 °F | 3.84 in. |
| November | 31.6 °F | 51.7 °F | 3.75 in. |
| December | 25.1 °F | 41.8 °F | 4.38 in. |
| Annual | 40.1 °F | 60.8 °F | 54.86 in. |
| 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 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 |