Fairlea, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40 °F (low) to 62.7 °F (high). Annual precipitation averages 41 Inches. Fairlea 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.3 °F | 40.3 °F | 3.02 in. |
| February | 23.1 °F | 43.6 °F | 2.82 in. |
| March | 29.0 °F | 52.8 °F | 3.59 in. |
| April | 38.3 °F | 64.1 °F | 3.72 in. |
| May | 47.8 °F | 72.0 °F | 4.43 in. |
| June | 55.9 °F | 78.5 °F | 4.24 in. |
| July | 60.0 °F | 82.0 °F | 3.88 in. |
| August | 58.6 °F | 81.0 °F | 3.41 in. |
| September | 51.7 °F | 75.5 °F | 3.44 in. |
| October | 39.5 °F | 65.2 °F | 2.56 in. |
| November | 29.9 °F | 53.4 °F | 2.49 in. |
| December | 24.6 °F | 43.4 °F | 3.36 in. |
| Annual | 40 °F | 62.7 °F | 40.96 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |