Upper Allen, PA has a humid continental climate with cold winters and warm summers. On average, temperatures range from the low 30s in winter to the mid-70s in summer. During the summer months, Upper Allen experiences frequent thunderstorms and humidity levels can be quite high. Winter temperatures can drop below freezing, but snow is usually light and melts quickly due to the humidity. The area receives an average of 40 inches of rainfall each year and generally experiences all four seasons.
Upper Allen, Pennsylvania gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Upper Allen averages 26 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 Upper Allen. The US average is 205 sunny days.
Upper Allen gets some kind of precipitation, on average, 123 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 43 inches of rain a year
Snow: averages 26 inches of snow a year