Chicago, Illinois, gets 36 inches of rain per year. The US average is 37. Snowfall is 28 inches. The average US city gets 25 inches of snow per year. The number of days with any measurable precipitation is 124.
On average, there are 189 sunny days per year in Chicago, Illinois. The July high is around 83 degrees. The January low is 18. Our comfort index, which is based on humidity during the hot months, is a 47 out of 100, where higher is more comfortable. The US average on the comfort index is 44.