The climate in Lemont, IL is temperate and seasonal. Summers are generally hot and humid, with temperatures usually reaching into the high 80s Fahrenheit (30 Celsius). Winters are usually cold and snowy, with temperatures ranging from the low 20s to high 30s Fahrenheit (-6 to 4 Celsius). With an average of 37 inches of precipitation annually, it is important to be prepared for all kinds of weather. The area also experiences some extreme temperature fluctuations throughout the year, so it is wise to plan ahead when traveling to Lemont.
Lemont, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Lemont averages 30 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 187 sunny days per year in Lemont. The US average is 205 sunny days.
Lemont 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 84 degrees
Winter Low: the January low is 15
Rain: averages 39 inches of rain a year
Snow: averages 30 inches of snow a year