Shannon, IL has a humid continental climate, characterized by warm summers and cold winters. During the summer months, temperatures are typically in the 70s and 80s while winter temperatures often dip below freezing. Precipitation is fairly consistent throughout the year, with light to moderate snowfall in the winter and occasional thunderstorm activity during the warmer months. Overall, Shannon enjoys four distinct seasons throughout the year, making it a great place to experience all of nature's beauty.
Shannon, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Shannon averages 31 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 197 sunny days per year in Shannon. The US average is 205 sunny days.
Shannon gets some kind of precipitation, on average, 114 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 12
Rain: averages 38 inches of rain a year
Snow: averages 31 inches of snow a year