Fenwick, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.1 °F (low) to 61.6 °F (high). Annual precipitation averages 55.6 Inches. Fenwick 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 | 19.5 °F | 39.7 °F | 4.16 in. |
| February | 21.2 °F | 42.8 °F | 3.96 in. |
| March | 27.9 °F | 51.2 °F | 4.96 in. |
| April | 37.2 °F | 63.2 °F | 4.64 in. |
| May | 46.7 °F | 71.1 °F | 5.83 in. |
| June | 55.1 °F | 77.5 °F | 5.7 in. |
| July | 59.1 °F | 80.5 °F | 5.96 in. |
| August | 58.0 °F | 79.5 °F | 4.51 in. |
| September | 51.5 °F | 74.4 °F | 4.15 in. |
| October | 39.8 °F | 64.2 °F | 3.56 in. |
| November | 29.6 °F | 52.3 °F | 3.62 in. |
| December | 23.9 °F | 42.4 °F | 4.58 in. |
| Annual | 39.1 °F | 61.6 °F | 55.63 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |