Philippi, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 5.2 °C (low) to 17.4 °C (high). Annual precipitation averages 1302.8 Millimeters. Philippi 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 | -5.9 °C | 4.4 °C | 99.57 mm |
| February | -4.9 °C | 6.3 °C | 94.49 mm |
| March | -1.3 °C | 11.3 °C | 111 mm |
| April | 4.1 °C | 18.3 °C | 109.22 mm |
| May | 9.5 °C | 22.6 °C | 134.37 mm |
| June | 14.3 °C | 26.6 °C | 131.83 mm |
| July | 16.6 °C | 28.4 °C | 145.8 mm |
| August | 15.7 °C | 27.9 °C | 101.6 mm |
| September | 11.9 °C | 25.1 °C | 96.01 mm |
| October | 5.3 °C | 18.7 °C | 91.44 mm |
| November | -0.1 °C | 12.2 °C | 83.82 mm |
| December | -3.3 °C | 6.7 °C | 103.63 mm |
| Annual | 5.2 °C | 17.4 °C | 1302.78 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 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 |