Forreston, Illinois gets 38 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Forreston averages 31 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 190 sunny days per year in Forreston. The US average is 205 sunny days.
Forreston gets some kind of precipitation, on average, 114 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 84 degrees
Winter Low: the January low is 12
Rain: averages 38 inches of rain a year
Snow: averages 31 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Forreston is 6.9 (10=best), which means it is less comfortable than most places in Illinois.
8.9 / 4.4
Summer / Winter
June, September and August are the most pleasant months in Forreston, while January and December are the least comfortable months.