Grantley, PA has a moderate climate with warm summers and mild winters. The average temperature in the summer months is usually around 70 degrees Fahrenheit, while the winter temperature averages around 40 degrees Fahrenheit. Rainfall is fairly consistent throughout the year, with an average of about 40 inches annually. Snowfall varies from year to year but typically ranges between 15 and 20 inches per year. The city experiences all four seasons in full force, and the weather can change drastically within a matter of hours.
Grantley, Pennsylvania gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Grantley averages 23 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 196 sunny days per year in Grantley. The US average is 205 sunny days.
Grantley 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 86 degrees
Winter Low: the January low is 21
Rain: averages 42 inches of rain a year
Snow: averages 23 inches of snow a year