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.
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.
Summer High: the July high is around 84 degrees
Winter Low: the January low is 15
Rain: averages 39 inches of rain a year
Snow: averages 33 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Glen Ellyn is 6.8 (10=best), which means it is less comfortable than most places in Illinois.
6.8 / 10
June, September and August are the most pleasant months in Glen Ellyn, while January and December are the least comfortable months.