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Naperville, Illinois, gets 38 inches of rain per year. The US average is 39. Snowfall is 29 inches. The average US city gets 26 inches of snow per year. The number of days with any measurable precipitation is 73.

On average, there are 189 sunny days per year in Naperville, Illinois. The July high is around 84 degrees. The January low is 15. Sperling's comfort index for Naperville is a 43 out of 100, where a higher score indicates a more comfortable year-around climate. The US average for the comfort index is 54. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.

  CLIMATENaperville, IllinoisUnited States
  Rainfall (in.)  37.699139.2
  Snowfall (in.)  28.93825.8
  Precipitation Days  73.2102
  Sunny Days  189205
  Avg. July High  83.980586.1
  Avg. Jan. Low  14.9922.6
  Comfort Index (higher=better)  4354
  UV Index  3.44.3
  Elevation ft.  6871,443


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It's an attractive place, but the traffic sucks and it's crowded than it was 14+ years ago. I like the festivals because of the bands, but everyone who's there has to be... (Read More)



Lived in Chicago suburbs my whole life. Napervill

I grew up in the Chicago area suburbs and have lived in every area. Naperville has, by far been my favorite! Yeah, Illinois drivers are total asshats and you're going... (Read More)



Naperville Retirement

When the family has left the nest, move out to a different tree. The taxes here will eat up your retirement $ in an... (Read More)



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