2025 Compare Climate & Weather:
Winnetka, IL vs Naperville, IL

Highlights

On average, there are 189 sunny days per year in Naperville. Winnetka averages 188 sunny days per year. The US average is 205 sunny days.

Naperville, Illinois gets 38.6 inches of rain, on average, per year. Winnetka, Illinois gets 36.4 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. Winnetka averages 35.9 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

Winnetka, Illinois
Summer High: the July high is around 83.1 degrees
Winter Low: the January low is 16.7
Rain: averages 36.4 inches of rain a year
Snow: averages 35.9 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 Winnetka is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

Today's Weather - Winnetka, IL

45°F

Today's Weather - Naperville, IL

47°F

Average Monthly High / Low (°F)

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

July is the hottest month for Winnetka with an average high temperature of 83.1°, which ranks it as one of the coolest places in Illinois. In Winnetka, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Winnetka are June, September and August.

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 Winnetka with an average of 16.7°. This is about average compared to other places in Illinois.

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

In Winnetka, there are 13.9 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

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 Winnetka, there are 122.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Illinois.

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 Winnetka, there are 6.2 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

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.

August is the wettest month in Winnetka with 4.3 inches of rain, and the driest month is February with 1.6 inches. The wettest season is Autumn with 32% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 36.4 inches in Winnetka means that it is one of the driest places in Illinois.


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.

April is the rainiest month in Winnetka with 12.2 days of rain, and February is the driest month with only 8.2 rainy days. There are 125.3 rainy days annually in Winnetka, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 28% of the time and the driest is Spring with only a 23% 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 35.9 inches in Winnetka means that it is one of the snowiest places in Illinois.

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

January is the snowiest month in Winnetka with 11.3 inches of snow, and 6 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.