Joliet, IL has a humid continental climate, characterized by warm summers and cold winters. During the summer months, temperatures typically range from the mid to high 70s during the day, with some days reaching into the 90s. Winters are cold, with temperatures dropping to as low as 0 degrees Fahrenheit. Precipitation is fairly evenly distributed throughout the year, but snowfall can be particularly heavy during winter months. The area also experiences occasional thunderstorms in the spring and summer months.
Joliet, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Joliet averages 28 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 Joliet. The US average is 205 sunny days.
Joliet gets some kind of precipitation, on average, 125 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 84 degrees
Winter Low: the January low is 16
Rain: averages 39 inches of rain a year
Snow: averages 28 inches of snow a year