Charlestown, PA has a humid continental climate, with warm summers and cold winters. The annual average temperature for the area is 49°F (9°C). Precipitation is relatively evenly distributed throughout the year, with an average of 40 inches (101 cm) annually. Snowfall totals can range from 4 to 8 inches (10 to 20 cm) during the winter months. In summertime, temperatures usually reach into the mid-70s (21°C). The area also experiences moderate humidity levels and a large amount of sunshine throughout the year.
Charlestown, Pennsylvania gets 46 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Charlestown averages 21 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 202 sunny days per year in Charlestown. The US average is 205 sunny days.
Charlestown gets some kind of precipitation, on average, 117 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 86 degrees
Winter Low: the January low is 20
Rain: averages 46 inches of rain a year
Snow: averages 21 inches of snow a year