Round Lake, IL has a humid continental climate. The summers tend to be hot and humid with temperatures usually reaching the low to mid 80s Fahrenheit. Winters are cold with temperatures dropping into the single digits and teens Fahrenheit. All four seasons can bring precipitation in various forms such as rain, snow and ice. Snowfall averages around 36 inches each year. Spring and fall are mild with temperatures ranging from 40-70F depending on the year.
Round Lake, Illinois gets 37 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Round Lake 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 Round Lake. The US average is 205 sunny days.
Round Lake gets some kind of precipitation, on average, 121 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 37 inches of rain a year
Snow: averages 43 inches of snow a year