The climate is Humid Continental. Most weather systems that effect the area develop in the Midwest, are caught up in the prevailing Westerlies, and are steered eastward. The primary source of moisture is the Gulf of Mexico with a secondary contribution by the Atlantic Ocean. Cold Canadian air masses are somewhat modified by the time they reach the Appalachians due to the long overland trajectory. The average annual precipitation of approximately 39 inches, somewhat less than locales along the western slopes of the Alleghenies, reflects this effect.
Summers are warm.
Extended periods of hot humid weather occur occasionally, and on the average 25 days during the summer reach 90 degrees or higher. Seldom does the mercury drop below 40 degrees during these months. Prevailing winds are from the southwest averaging 8 to 10 mph. Summer season rainfall is adequate, falling for the most part in the form of thundershowers which are observed on an average of 22 days. The numerous ridges and narrow valleys throughout this contribute to persistent orographic instability cloudiness during the winter season when cold air masses continually advect through the area.