Monongah, West Virginia has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.6 °F (low) to 63.7 °F (high). Annual precipitation averages 48.2 Inches. Monongah is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.5 °F | 39.6 °F | 3.71 in. |
| February | 23.2 °F | 43.0 °F | 3.29 in. |
| March | 29.6 °F | 52.4 °F | 4.07 in. |
| April | 39.5 °F | 65.6 °F | 4.01 in. |
| May | 49.3 °F | 73.8 °F | 4.89 in. |
| June | 58.0 °F | 81.0 °F | 4.75 in. |
| July | 62.2 °F | 84.3 °F | 5.22 in. |
| August | 61.0 °F | 83.4 °F | 4.0 in. |
| September | 53.9 °F | 77.7 °F | 3.69 in. |
| October | 42.0 °F | 66.0 °F | 3.37 in. |
| November | 32.5 °F | 53.9 °F | 3.37 in. |
| December | 26.2 °F | 43.7 °F | 3.85 in. |
| Annual | 41.6 °F | 63.7 °F | 48.22 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |