Glendale Heights, IL Climate

Glendale Heights, IL has a humid continental climate with warm summers and cold winters. The average temperature in summer highs range from the mid-70s to mid-80s, while winter lows can vary from the teens to the low 20s. The area receives an average of 35 inches of precipitation annually, with snowfall ranging between 14 and 22 inches per year. Average humidity levels are high throughout the year, creating a more humid environment in summer months. The Glendale Heights area also experiences four distinct seasons, giving residents a variety of weather patterns to enjoy year round.

Glendale Heights, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Glendale Heights averages 33 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 185 sunny days per year in Glendale Heights. The US average is 205 sunny days.

Glendale Heights 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 85 degrees
Winter Low: the January low is 14
Rain: averages 38 inches of rain a year
Snow: averages 33 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Glendale Heights is 6.8 (10=best), which means it is less comfortable than most places in Illinois.

8.8 Summer - 4.5 Winter

June, September and August are the most pleasant months in Glendale Heights, while January and December are the least comfortable months.

Climate	Glendale Heights, Illinois	United States
	37.9 in.	38.1 in.
	32.8 in.	27.8 in.
	122.0 days	106.2 days
	185 days	205 days
	85.1°	85.8°
	13.6°	21.7°
	6.8	7
	3.4	4.3
	761 ft.	2443 ft.

Climate

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.

July is the hottest month for Glendale Heights with an average high temperature of 85.1°, which ranks it as about average compared to other places in Illinois. In Glendale Heights, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Glendale Heights are September, June and August.

In Glendale Heights, there are 16.3 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

January has the coldest nighttime temperatures for Glendale Heights with an average of 13.6°. This is colder than most places in Illinois.

In Glendale Heights, there are 144.1 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Illinois.

In Glendale Heights, there are 8.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

The humidity is usually comfortable in Glendale Heights 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 Glendale Heights with 4.5 inches of rain, and the driest month is January with 1.6 inches. The wettest season is Autumn with 34% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 37.9 inches in Glendale Heights means that it is drier than most places in Illinois.

May is the rainiest month in Glendale Heights with 12.0 days of rain, and September is the driest month with only 8.0 rainy days. There are 122.0 rainy days annually in Glendale Heights, 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 32.8 inches in Glendale Heights means that it is snowier than most places in Illinois. January is the snowiest month in Glendale Heights with 10.8 inches of snow, and 6 months of the year have significant snowfall.