Pine Grove, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.9 °F (low) to 63.7 °F (high). Annual precipitation averages 52.2 Inches. Pine Grove 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 | 20.8 °F | 39.1 °F | 3.97 in. |
| February | 22.5 °F | 42.8 °F | 3.64 in. |
| March | 28.9 °F | 52.3 °F | 4.59 in. |
| April | 38.9 °F | 66.0 °F | 4.29 in. |
| May | 48.9 °F | 74.0 °F | 5.24 in. |
| June | 57.6 °F | 81.2 °F | 4.75 in. |
| July | 61.8 °F | 84.5 °F | 5.71 in. |
| August | 60.4 °F | 83.6 °F | 4.29 in. |
| September | 53.2 °F | 78.0 °F | 3.86 in. |
| October | 41.1 °F | 66.2 °F | 3.6 in. |
| November | 31.5 °F | 54.0 °F | 3.85 in. |
| December | 25.6 °F | 43.2 °F | 4.36 in. |
| Annual | 40.9 °F | 63.7 °F | 52.15 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 |