The most pleasant months of the year for Glen Ellyn are June, September and August. In Glen Ellyn, there are 5 comfortable months with high temperatures in the range of 70-85°. 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. January is the snowiest month in Glen Ellyn with 10.7 inches of snow, and 6 months of the year have significant snowfall. July is the most humid month, though humidity is low for most of the year.
Today's Weather - Glen Ellyn, IL
8 PM PST
|7 DAY FORECAST||DESCRIPTION||HIGH/LOW||WIND|
|Tonight||Partly Cloudy||67° / 86°||WSW 5 to 10 mph|
|Wednesday Night||Mostly Cloudy then Slight Chance Showers And Thunderstorms||69° / 87°||SW 5 mph|
|Thursday Night||Chance Showers And Thunderstorms||69° / 87°||SW 0 to 5 mph|
|Friday Night||Slight Chance Showers And Thunderstorms||70° / 89°||SW 0 to 5 mph|
|Saturday Night||Partly Cloudy||69° / 87°||WSW 0 to 5 mph|
|Sunday Night||Partly Cloudy||67° / 88°||W 0 to 5 mph|
|Monday Night||Chance Showers And Thunderstorms||69° / 87°||WSW 5 mph|
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
SPERLING'S COMFORT INDEX
Glen Ellyn ranks 42/100 for Comfort Index
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.
Average Monthly High and Low (°F)
Hot, Freezing, Rainy, Snowy Days: Glen Ellyn
YOU SHOULD KNOW
Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.
Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.
Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.