Charleston, Illinois gets 40 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Charleston averages 15 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 202 sunny days per year in Charleston. The US average is 205 sunny days.
Charleston gets some kind of precipitation, on average, 111 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.
Summer High: the July high is around 86 degrees
Winter Low: the January low is 20
Rain: averages 40 inches of rain a year
Snow: averages 15 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Charleston is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.
7.2 / 10
September, May and June are the most pleasant months in Charleston, while January and December are the least comfortable months.