2025 Compare Climate & Weather:
Naperville, IL vs Covington, WA

Highlights

On average, there are 153 sunny days per year in Covington. Naperville averages 189 sunny days per year. The US average is 205 sunny days.

Covington, Washington gets 44.9 inches of rain, on average, per year. Naperville, Illinois gets 38.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Covington averages 6.1 inches of snow per year. Naperville averages 28.7 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Covington, Washington
Summer High: the July high is around 76.3 degrees
Winter Low: the January low is 35.5
Rain: averages 44.9 inches of rain a year
Snow: averages 6.1 inches of snow a year

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

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Covington is 7.2 (10=best), which means it is more comfortable than most places in Washington.

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

Today's Weather - Naperville, IL

44°F

Today's Weather - Covington, WA

43°F

Average Monthly High / Low (°F)

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

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.

August is the hottest month for Covington with an average high temperature of 76.6°, which ranks it as about average compared to other places in Washington. In Covington, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Covington are August, July and September.

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

December has the coldest nighttime temperatures for Covington with an average of 34.1°. This is warmer than most places in Washington.

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 Covington, there are 3.3 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

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 Covington, there are 40.5 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

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.

In Covington, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

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.


November is the wettest month in Covington with 7.3 inches of rain, and the driest month is July with 1.0 inches. The wettest season is Spring with 37% of yearly precipitation and 10% occurs in Autumn, which is the driest season. The annual rainfall of 44.9 inches in Covington means that it is wetter than most places in Washington.

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.

November is the rainiest month in Covington with 19.5 days of rain, and August is the driest month with only 5.1 rainy days. There are 161.9 rainy days annually in Covington, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 13% chance of a rainy day.

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

An annual snowfall of 6.1 inches in Covington means that it is about average compared to other places in Washington.

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

December is the snowiest month in Covington with 1.9 inches of snow, and 5 months of the year have significant snowfall.