Glen Ellyn, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Glen Ellyn averages 33 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 191 sunny days per year in Glen Ellyn. The US average is 205 sunny days.
Summer High: the July high is around 84 degrees
Winter Low: the January low is 15
Sperling's Comfort Index for Glen Ellyn is a 42 out of 100
A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.
YOU SHOULD KNOW
Glen Ellyn gets some kind of precipitation, on average, 122 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.