Will County, IL Climate

The climate in Will County, IL is generally mild, with cold winters and hot summers. The average temperature in winter is around 25 degrees Fahrenheit and the average temperature in summer is around 77 degrees Fahrenheit. April and May are typically the wettest months of the year, while June through August are usually the driest. The area receives an average of 34 inches of rainfall annually, making it quite humid during the summer months. Winters tend to be relatively dry, with snowfall averaging around 15 inches per year. On average, Will County experiences about 175 days of sunshine each year, making it a great place for outdoor activities when the weather permits!

Will County, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Will County averages 28 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 189 sunny days per year in Will County. The US average is 205 sunny days.

Will County gets some kind of precipitation, on average, 121 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 16
Rain: averages 39 inches of rain a year
Snow: averages 28 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Will County is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

8.9 Summer - 4.6 Winter

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

Climate	Will, Illinois	United States
	39.0 in.	38.1 in.
	28.0 in.	27.8 in.
	120.7 days	106.2 days
	189 days	205 days
	84.1°	85.8°
	15.7°	21.7°
	6.9	7
	3.7	4.3
	661 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 Will County with an average high temperature of 84.1°, which ranks it as cooler than most places in Illinois. In Will County, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Will County are September, June and August.

In Will County, there are 12.1 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

January has the coldest nighttime temperatures for Will County with an average of 15.7°. This is colder than most places in Illinois.

In Will County, there are 125.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Will County, there are 7.3 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 Will County 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.

July is the wettest month in Will County with 4.5 inches of rain, and the driest month is January with 1.8 inches. The wettest season is Autumn with 33% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 39.0 inches in Will County means that it is about average compared to other places in Illinois.

May is the rainiest month in Will County with 12.0 days of rain, and September is the driest month with only 7.9 rainy days. There are 120.7 rainy days annually in Will County, which is rainier than most 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 28.0 inches in Will County means that it is snowier than most places in Illinois. January is the snowiest month in Will County with 8.8 inches of snow, and 6 months of the year have significant snowfall.

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