Climate in Glen Ellyn, Illinois

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.

Weather Highlights

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.

July is the hottest month for Glen Ellyn with an average high temperature of 84.2°, which ranks it as cooler than most places in Illinois. In Glen Ellyn, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Glen Ellyn are June, September and August.

In Glen Ellyn, there are 9.3 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

January has the coldest nighttime temperatures for Glen Ellyn with an average of 15.0°. This is colder than most places in Illinois.

In Glen Ellyn, there are 138.0 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Glen Ellyn, there are 5.7 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

The humidity is usually comfortable in Glen Ellyn but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.

August is the wettest month in Glen Ellyn with 4.2 inches of rain, and the driest month is January with 1.9 inches. The wettest season is Autumn with 32% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.6 inches in Glen Ellyn means that it is about average compared to other places in Illinois.

May is the rainiest month in Glen Ellyn with 11.9 days of rain, and September is the driest month with only 8.0 rainy days. There are 121.6 rainy days annually in Glen Ellyn, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 32.6 inches in Glen Ellyn means that it is snowier than most places in Illinois. January is the snowiest month in Glen Ellyn with 10.7 inches of snow, and 6 months of the year have significant snowfall.

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