Will County, Illinois 

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Climate in Will County, Illinois

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


SPERLING'S COMFORT INDEX
Will County ranks 44/100 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.

CLIMATE

Climate Averages
  Will, IllinoisUnited States
  39.0 in.38.1 in.
  28.0 in.27.8 in.
  120.7 days106.2 days
  189 days205 days
  84.1°85.8°
  15.7°21.7°
  4454
  3.74.3
  661 ft.2443 ft.

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.


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 12.1 days annually when the high temperature is over 90°, which is cooler 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.


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.


CLIMATE MAP
  • Annual Rainfall (US Avg: 36.5")
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    MAPS OF WILL COUNTY, ILLINOIS
    ZIP CODES IN WILL COUNTY, ILLINOIS
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