Masontown, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40.3 °F (low) to 61.2 °F (high). Annual precipitation averages 52.2 Inches. Masontown 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 | 20.7 °F | 37.8 °F | 4.04 in. |
| February | 22.1 °F | 41.1 °F | 3.62 in. |
| March | 28.5 °F | 50.0 °F | 4.26 in. |
| April | 38.4 °F | 62.6 °F | 4.49 in. |
| May | 47.9 °F | 70.9 °F | 5.13 in. |
| June | 56.3 °F | 77.8 °F | 5.19 in. |
| July | 60.2 °F | 81.2 °F | 5.8 in. |
| August | 59.0 °F | 80.3 °F | 4.38 in. |
| September | 52.4 °F | 75.0 °F | 3.65 in. |
| October | 41.2 °F | 63.7 °F | 3.64 in. |
| November | 31.9 °F | 52.0 °F | 3.78 in. |
| December | 25.4 °F | 42.1 °F | 4.25 in. |
| Annual | 40.3 °F | 61.2 °F | 52.23 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |