Greencastle, PA has a humid continental climate with an average yearly temperature of 51°F (10.6°C). Summers in Greencastle are warm and humid with temperatures often reaching into the 80s (27°C) or higher while winters tend to be cold with temperatures often dropping below freezing. Precipitation is fairly evenly distributed throughout the year, with February being the driest month and May being the wettest. Snowfall averages around 33 inches (84 cm) per year, typically occurring in the months from December through March.
Greencastle, Pennsylvania gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Greencastle averages 29 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 197 sunny days per year in Greencastle. The US average is 205 sunny days.
Greencastle gets some kind of precipitation, on average, 119 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 85 degrees
Winter Low: the January low is 22
Rain: averages 41 inches of rain a year
Snow: averages 29 inches of snow a year