61951 Sullivan, IL has a humid continental climate characterized by warm summers and cold winters. The area experiences four distinct seasons with the temperature in summer ranging from 70-85°F and in winter temperatures dropping below 20°F at times. Precipitation is fairly evenly distributed throughout the year with spring and fall being the wettest months. Snowfall is common in winter months, though it does not usually exceed 3 inches per month.
Sullivan (zip 61951), Illinois gets 41 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Sullivan (zip 61951) averages 12 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 Sullivan (zip 61951). The US average is 205 sunny days.
Sullivan (zip 61951) gets some kind of precipitation, on average, 101 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 86 degrees
Winter Low: the January low is 19
Rain: averages 41 inches of rain a year
Snow: averages 12 inches of snow a year