Beaver, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5 °C (low) to 16.8 °C (high). Annual precipitation averages 1115.6 Millimeters. Beaver 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 4.7 °C | 77.72 mm |
| February | -4.5 °C | 6.7 °C | 74.93 mm |
| March | -1.1 °C | 11.2 °C | 99.31 mm |
| April | 4 °C | 17.8 °C | 99.57 mm |
| May | 9.2 °C | 21.9 °C | 118.87 mm |
| June | 13.7 °C | 25.4 °C | 107.19 mm |
| July | 15.8 °C | 27.1 °C | 130.3 mm |
| August | 15 °C | 26.6 °C | 93.98 mm |
| September | 11.6 °C | 23.7 °C | 84.84 mm |
| October | 5.1 °C | 17.9 °C | 67.06 mm |
| November | -0.5 °C | 11.9 °C | 69.6 mm |
| December | -3.3 °C | 6.5 °C | 92.2 mm |
| Annual | 5 °C | 16.8 °C | 1115.57 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |