Crystal Lake, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Crystal Lake averages 35 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 186 sunny days per year in Crystal Lake. The US average is 205 sunny days.
Crystal Lake 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 82 degrees
Winter Low: the January low is 13
Rain: averages 37 inches of rain a year
Snow: averages 35 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Crystal Lake is 6.8 (10=best), which means it is less comfortable than most places in Illinois.
6.8 / 10
June, August and September are the most pleasant months in Crystal Lake, while January and December are the least comfortable months.