West Virginia Climate

The climate of West Virginia borders on a humid subtropical climate (Koppen climate classification Cfa) in the lower elevations of the extreme southwestern part of the state (including Huntington) and parts of the Eastern Panhandle east of the Appalachians with hot, humid summers and milder winters. The rest of the state has a humid continental climate (Koppen climate classification Dfa, except Dfb at the higher elevations) with warm to hot, humid summers and cold winters, increasing in severity with elevation. However, the weather is subject in all parts of the state to change. The hardiness zones range from zone 5b in the central Appalachian mountains to zone 7a in the warmest parts of the lowest elevations. In the Eastern Panhandle and the Ohio River Valley temperatures are warm enough to see and grow subtropical plants such as Southern magnolia, Crape Myrtle, Albizia julibrissin, American Sweetgum and even the occasional needle palm and sabal minor. These plants don't thrive as well in other parts of the state.

Average January temperatures range from around 28°F (-2°C) near the Cheat River to 43°F (5°C) along sections of the border with Kentucky. July averages range from 67°F (19°C) along the North Branch of the Potomac River to 76°F (24°C) in the western part of the state. It is cooler in the mountains than in the lower sections of the state.

Annual precipitation ranges from less than 32 inches (810 mm) in the lower eastern section to more than 56 inches (1,400 mm) in higher parts of the Allegheny Front. Slightly more than half the rainfall occurs from April to September. Dense fogs are common in many valleys of the Kanawha section, especially the Tygart Valley. Snow usually lasts only a few days in the lower sections but may persist for weeks in the higher mountain areas. An average of 34 inches (86 cm) of snow falls annually in Charleston, although during the winter of 1995-1996 more than three times that amount fell as several cities in the state established new records for snowfall.