Oak Forest, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Oak Forest averages 31 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 188 sunny days per year in Oak Forest. The US average is 205 sunny days.
Oak Forest gets some kind of precipitation, on average, 123 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 18
Rain: averages 39 inches of rain a year
Snow: averages 31 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Oak Forest is 7.0 (10=best), which means it is about average compared to other places in Illinois.
7 / 10
September, June and August are the most pleasant months in Oak Forest, while January and December are the least comfortable months.