Naperville, IL has a humid continental climate, meaning that the summers are hot and humid with temperatures ranging from the upper 80s to mid 90s throughout the season. Winters in Naperville are cold and snowy, with temperatures averaging between the low 20s and mid 30s during December and January. Snowfall typically ranges from around 10 inches in November up to 25 inches or more in February. Spring and fall have mild temperatures with highs in the 50s and 60s throughout April and October. Overall, Naperville offers four distinct seasons for outdoor activities and exploration all year round.
Naperville, Illinois gets 39 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Naperville averages 29 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 189 sunny days per year in Naperville. The US average is 205 sunny days.
Naperville 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 84 degrees
Winter Low: the January low is 15
Rain: averages 39 inches of rain a year
Snow: averages 29 inches of snow a year