Illinois, Illinois gets 40 inches of rain, on average, per year. The US average is 39 inches of rain per year.
Illinois averages 22 inches of snow per year. The US average is 26 inches of snow per year.
On average, there are 198 sunny days per year in Illinois. The US average is 205 sunny days.
Summer High: the July high is around 86 degrees
Winter Low: the January low is 17
Sperling's Comfort Index for Illinois is a 41 out of 100
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.
YOU SHOULD KNOW
Illinois gets some kind of precipitation, on average, 104 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.