Dennison, IL is located in central Illinois and has a climate that features hot, humid summers and cold winters. Summers typically bring temperatures of up to 90 degrees Fahrenheit (32°C) with high humidity levels. Winter temperatures in Dennison can be quite cold, and the city often experiences snowfall throughout the season. The area also receives an average of 39 inches of rainfall per year.
Dennison (zip 62423), Illinois gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Dennison (zip 62423) averages 18 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 194 sunny days per year in Dennison (zip 62423). The US average is 205 sunny days.
Dennison (zip 62423) gets some kind of precipitation, on average, 113 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 87 degrees
Winter Low: the January low is 20
Rain: averages 44 inches of rain a year
Snow: averages 18 inches of snow a year