Flat Rock, IL has a humid continental climate, with four distinct seasons varying from hot summers to cold winters. Summers in Flat Rock can be warm and humid, with temperatures reaching as high as 90 degrees Fahrenheit at times. Winters in Flat Rock are typically cold, with temperatures dropping below freezing for extended periods of time. Rain is frequent throughout the year, but snowfall is usually moderate. The spring and fall months tend to be mild and pleasant. All in all, the climate in Flat Rock is typical of an area situated in the Midwest region of the United States.
Flat Rock, Illinois gets 45 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Flat Rock averages 12 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 199 sunny days per year in Flat Rock. The US average is 205 sunny days.
Flat Rock gets some kind of precipitation, on average, 107 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 88 degrees
Winter Low: the January low is 23
Rain: averages 45 inches of rain a year
Snow: averages 12 inches of snow a year