Weather Forecast and Radar for Round Lake, Illinois

Weather in Round Lake, IL

Round Lake, Illinois, United States has a typical Midwestern climate with four distinct seasons.

In the winter months, temperatures average between 20 and 30 degrees Fahrenheit, with occasional snowfall. On the coldest days of the year, temperatures can drop below 0 degrees Fahrenheit.

Spring in Round Lake is mild, with temperatures ranging from the mid-30s to the mid-50s. Rainfall is common in the spring months.

Summer is the warmest time of year in Round Lake, with average temperatures between 60 and 80 degrees Fahrenheit. The humidity is often high, and thunderstorms are not uncommon.

Fall is the mildest season in Round Lake, with temperatures ranging from the mid-50s to the mid-70s. Rainfall is still common, and the leaves change to beautiful shades of red, yellow, and orange.

Fast Facts About Round Lake, IL

As of 2020, the city population is 18235.

Major Cities Nearby Round Lake, IL

This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Round Lake, Illinois.