Harrisburg, Illinois gets 49 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Harrisburg averages 8 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 Harrisburg. The US average is 205 sunny days.
Harrisburg gets some kind of precipitation, on average, 102 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 88 degrees
Winter Low: the January low is 22
Rain: averages 49 inches of rain a year
Snow: averages 8 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Harrisburg is 7.3 (10=best), which means it is one of the most pleasant places in Illinois.
7.7 / 5.7
Summer / Winter
September, May and June are the most pleasant months in Harrisburg, while January and December are the least comfortable months.