Forreston, IL has a continental climate with hot summers and cold winters. The temperature typically ranges from 20 to 90 degrees Fahrenheit, with an annual average of around 50 degrees. During the summer months, temperatures can reach the high 80s and low 90s on occasion. Wintertime temperatures can dip into the single digits at times though snowfall is light and rarely accumulates more than a few inches on the ground. Rainfall is fairly consistent throughout the year but tends to be higher during spring and summer months.
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.
Weather Highlights
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