2025 Compare Climate & Weather:
Edison, NJ vs Naperville, IL

Highlights

On average, there are 189 sunny days per year in Naperville. Edison averages 206 sunny days per year. The US average is 205 sunny days.

Naperville, Illinois gets 38.6 inches of rain, on average, per year. Edison, New Jersey gets 48.4 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Naperville averages 28.7 inches of snow per year. Edison averages 24.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Naperville, Illinois
Summer High: the July high is around 83.8 degrees
Winter Low: the January low is 15.1
Rain: averages 38.6 inches of rain a year
Snow: averages 28.7 inches of snow a year

Edison, New Jersey
Summer High: the July high is around 86.3 degrees
Winter Low: the January low is 22.2
Rain: averages 48.4 inches of rain a year
Snow: averages 24.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Naperville is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

The annual BestPlaces Comfort Index for Edison is 7.2 (10=best), which means it is about average compared to other places in New Jersey.

Today's Weather - Edison, NJ

60°F

Today's Weather - Naperville, IL

68°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Edison / Naperville

July is the hottest month for Edison with an average high temperature of 86.3°, which ranks it as warmer than most places in New Jersey. In Edison, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Edison are September, June and May.

July is the hottest month for Naperville with an average high temperature of 83.8°, which ranks it as cooler than most places in Illinois. In Naperville, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Naperville are June, September and August.

January has the coldest nighttime temperatures for Edison with an average of 22.2°. This is about average compared to other places in New Jersey.

January has the coldest nighttime temperatures for Naperville with an average of 15.1°. This is colder than most places in Illinois.

In Edison, there are 20.7 days annually when the high temperature is over 90°, which is hotter than most places in New Jersey.

In Naperville, there are 8.6 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Edison, there are 107.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in New Jersey.

In Naperville, there are 135.4 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Edison, there are 0.7 days annually when the nighttime low temperature falls below zero°, which is colder than most places in New Jersey.

In Naperville, there are 6.1 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

July is the wettest month in Edison with 5.3 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Autumn with 28% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 48.4 inches in Edison means that it is wetter than most places in New Jersey.


August is the wettest month in Naperville with 4.2 inches of rain, and the driest month is January with 1.9 inches. The wettest season is Autumn with 32% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.6 inches in Naperville means that it is about average compared to other places in Illinois.

May is the rainiest month in Edison with 11.3 days of rain, and September is the driest month with only 8.4 rainy days. There are 116.1 rainy days annually in Edison, which is about average compared to other places in New Jersey. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

May is the rainiest month in Naperville with 12.0 days of rain, and September is the driest month with only 7.9 rainy days. There are 120.3 rainy days annually in Naperville, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Winter with only a 22% chance of a rainy day.

An annual snowfall of 24.2 inches in Edison means that it is about average compared to other places in New Jersey.

An annual snowfall of 28.7 inches in Naperville means that it is snowier than most places in Illinois.

February is the snowiest month in Edison with 8.1 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Naperville with 9.1 inches of snow, and 6 months of the year have significant snowfall.