Dailey, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.9 °C (low) to 16.5 °C (high). Annual precipitation averages 1282.9 Millimeters. Dailey is located in USDA Plant Hardiness Zone 6a. 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 | -7.1 °C | 3.8 °C | 89.66 mm |
| February | -6.1 °C | 5.7 °C | 80.01 mm |
| March | -2.5 °C | 10.4 °C | 109.22 mm |
| April | 2.8 °C | 17.2 °C | 109.47 mm |
| May | 8.3 °C | 21.6 °C | 138.68 mm |
| June | 12.9 °C | 25.4 °C | 130.81 mm |
| July | 15.3 °C | 27.3 °C | 151.89 mm |
| August | 14.5 °C | 26.7 °C | 106.93 mm |
| September | 10.6 °C | 24 °C | 96.01 mm |
| October | 3.8 °C | 18.2 °C | 93.73 mm |
| November | -1.4 °C | 11.5 °C | 80.26 mm |
| December | -4.6 °C | 6.1 °C | 96.27 mm |
| Annual | 3.9 °C | 16.5 °C | 1282.94 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |