Grayslake, IL is a city located in the northern part of Illinois, near the Wisconsin border. It has a temperate climate with four distinct seasons. Summers are hot and humid, with temperatures reaching into the high 80s or low 90s on occasion. Spring and fall are mild, with average temperatures ranging between 40-70 degrees Fahrenheit. Winter can be cold and snowy, with temperatures often falling to single digits or below zero at night. Despite these cooler months, snowfall is relatively light compared to other parts of the country due to its location near Lake Michigan.
Grayslake, Illinois gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Grayslake averages 43 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 192 sunny days per year in Grayslake. The US average is 205 sunny days.
Grayslake gets some kind of precipitation, on average, 120 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 82 degrees
Winter Low: the January low is 14
Rain: averages 36 inches of rain a year
Snow: averages 43 inches of snow a year