Glen Fork, West Virginia has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 5.9 °C (low) to 17.8 °C (high). Annual precipitation averages 1298.7 Millimeters. Glen Fork is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.5 °C | 5.5 °C | 100.08 mm |
| February | -3.4 °C | 7.7 °C | 95.25 mm |
| March | 0 °C | 12.4 °C | 122.68 mm |
| April | 5 °C | 19 °C | 118.11 mm |
| May | 10.2 °C | 23 °C | 136.14 mm |
| June | 14.7 °C | 26.6 °C | 118.87 mm |
| July | 16.7 °C | 28.2 °C | 144.27 mm |
| August | 15.9 °C | 27.7 °C | 107.19 mm |
| September | 12.5 °C | 24.7 °C | 85.6 mm |
| October | 5.8 °C | 18.8 °C | 75.69 mm |
| November | 0.5 °C | 12.7 °C | 82.8 mm |
| December | -2.3 °C | 7.3 °C | 112.01 mm |
| Annual | 5.9 °C | 17.8 °C | 1298.69 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |