Williamstown, PA has a humid continental climate with warm, humid summers and cold winters. Average temperatures range from highs of 85°F in the summer to lows of 22°F in the winter. The area receives around 35 inches of precipitation each year and experiences four distinct seasons with wet springs and mild autumns. Snowfall accumulates to an average of 21 inches each year, making Williamstown an ideal location for enjoying a variety of outdoor activities like skiing, snowshoeing, and ice skating.
Williamstown, Pennsylvania gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Williamstown averages 28 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 200 sunny days per year in Williamstown. The US average is 205 sunny days.
Williamstown gets some kind of precipitation, on average, 121 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 83 degrees
Winter Low: the January low is 19
Rain: averages 46 inches of rain a year
Snow: averages 28 inches of snow a year