Lewisburg, West Virginia has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.5 °C (low) to 17.1 °C (high). Annual precipitation averages 1047.5 Millimeters. Lewisburg 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.8 °C | 4.7 °C | 77.98 mm |
| February | -4.9 °C | 6.6 °C | 72.9 mm |
| March | -1.6 °C | 11.6 °C | 91.69 mm |
| April | 3.6 °C | 17.9 °C | 95.25 mm |
| May | 8.8 °C | 22.3 °C | 112.52 mm |
| June | 13.3 °C | 25.8 °C | 108.71 mm |
| July | 15.6 °C | 27.8 °C | 98.55 mm |
| August | 14.9 °C | 27.2 °C | 86.87 mm |
| September | 11.1 °C | 24.2 °C | 87.63 mm |
| October | 4.3 °C | 18.5 °C | 65.28 mm |
| November | -1.1 °C | 11.9 °C | 63.5 mm |
| December | -4 °C | 6.4 °C | 86.61 mm |
| Annual | 4.5 °C | 17.1 °C | 1047.49 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |