Chillicothe, IL experiences a humid continental climate with warm summers and cold winters. The average summer temperature is around 75°F, while the average winter temperature is around 24°F. During the summer months, there are often thunderstorms and high levels of humidity, making it very uncomfortable at times. Snowfall can be quite heavy during the winter months, sometimes reaching up to 10 inches on an especially cold day. Spring and autumn in Chillicothe are generally mild and pleasant, providing plenty of opportunities for outdoor activities.
Chillicothe, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Chillicothe averages 21 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 189 sunny days per year in Chillicothe. The US average is 205 sunny days.
Chillicothe gets some kind of precipitation, on average, 104 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 17
Rain: averages 39 inches of rain a year
Snow: averages 21 inches of snow a year