Iroquois, IL has a humid continental climate, with hot, humid summers and cold winters. The area receives an average of 38 inches of precipitation throughout the year, most of which falls in the spring and summer months. Temperatures range from highs in the 80s during the summer to lows below freezing during the winter. Snowfall is common during the winter months, though snow accumulation is relatively light. Due to its location on Lake Michigan, Iroquois also experiences a lake effect snowfall pattern in late autumn and winter when waves of cold air moves across the lake's warmer waters.
Iroquois, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Iroquois averages 21 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 186 sunny days per year in Iroquois. The US average is 205 sunny days.
Iroquois gets some kind of precipitation, on average, 109 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 15
Rain: averages 39 inches of rain a year
Snow: averages 21 inches of snow a year