Oak Hill, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.3 °C (low) to 16.9 °C (high). Annual precipitation averages 1204 Millimeters. Oak Hill 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.4 °C | 4.3 °C | 85.34 mm |
| February | -4.3 °C | 6.5 °C | 83.57 mm |
| March | -0.9 °C | 11.2 °C | 109.98 mm |
| April | 4.5 °C | 18.1 °C | 105.66 mm |
| May | 9.5 °C | 22.3 °C | 125.48 mm |
| June | 14 °C | 25.7 °C | 125.22 mm |
| July | 16.2 °C | 27.3 °C | 131.57 mm |
| August | 15.4 °C | 26.8 °C | 100.33 mm |
| September | 12.1 °C | 23.9 °C | 93.22 mm |
| October | 5.5 °C | 18.1 °C | 72.9 mm |
| November | 0.2 °C | 11.8 °C | 75.18 mm |
| December | -3.1 °C | 6.3 °C | 95.5 mm |
| Annual | 5.3 °C | 16.9 °C | 1203.95 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |