The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Charleston, IL vs Romeoville, IL

2025 Compare Climate & Weather:
Charleston, IL vs Romeoville, IL

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Highlights

On average, there are 192 sunny days per year in Romeoville. Charleston averages 202 sunny days per year. The US average is 205 sunny days.

Romeoville, Illinois gets 39.1 inches of rain, on average, per year. Charleston, Illinois gets 40.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Romeoville averages 30.1 inches of snow per year. Charleston averages 15.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Romeoville, Illinois
Summer High: the July high is around 83.9 degrees
Winter Low: the January low is 15.7
Rain: averages 39.1 inches of rain a year
Snow: averages 30.1 inches of snow a year

Charleston, Illinois
Summer High: the July high is around 86.2 degrees
Winter Low: the January low is 20.2
Rain: averages 40.3 inches of rain a year
Snow: averages 15.1 inches of snow a year

BestPlaces Comfort Index
Romeoville

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

6.9 / 10
June, September and August are the most pleasant months in Romeoville, while January and December are the least comfortable months.

Charleston

The annual BestPlaces Comfort Index for Charleston is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

7.2 / 10
September, May and June are the most pleasant months in Charleston, while January and December are the least comfortable months.

Average Monthly High / Low (°F)
MonthCharleston, ILRomeoville, IL
January35° / 20°31° / 16°
February40° / 24°36° / 19°
March52° / 33°47° / 28°
April65° / 44°60° / 39°
May74° / 53°71° / 49°
June83° / 63°80° / 59°
July86° / 66°84° / 63°
August85° / 64°82° / 62°
September79° / 56°76° / 53°
October66° / 45°63° / 42°
November52° / 35°49° / 32°
December39° / 24°35° / 20°
Hot, Freezing, Rainy, Snowy Days: Charleston / Romeoville
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 026 / 289 / 114 / 7
February0 / 022 / 258 / 92 / 5
March0 / 015 / 2110 / 111 / 3
April0 / 03 / 711 / 120 / 0
May1 / 10 / 012 / 120 / 0
June4 / 30 / 010 / 110 / 0
July7 / 40 / 09 / 100 / 0
August6 / 20 / 08 / 100 / 0
September2 / 10 / 07 / 80 / 0
October0 / 03 / 49 / 100 / 0
November0 / 012 / 1610 / 100 / 1
December0 / 023 / 2710 / 123 / 7
July is the hottest month for Charleston with an average high temperature of 86.2°, which ranks it as warmer than most places in Illinois. In Charleston, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Charleston are September, May and June.

July is the hottest month for Romeoville with an average high temperature of 83.9°, which ranks it as cooler than most places in Illinois. In Romeoville, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Romeoville are June, September and August.
January has the coldest nighttime temperatures for Charleston with an average of 20.2°. This is warmer than most places in Illinois.

January has the coldest nighttime temperatures for Romeoville with an average of 15.7°. This is colder than most places in Illinois.

In Charleston, there are 20.6 days annually when the high temperature is over 90°, which is about average compared to other places in Illinois.

In Romeoville, there are 10.5 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Charleston, there are 103.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Romeoville, there are 127.6 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Charleston, there are 3.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

In Romeoville, there are 6.6 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Illinois.

May is the wettest month in Charleston with 4.4 inches of rain, and the driest month is February with 2.1 inches. The wettest season is Autumn with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 40.3 inches in Charleston means that it is wetter than most places in Illinois.


July is the wettest month in Romeoville with 4.6 inches of rain, and the driest month is January with 1.8 inches. The wettest season is Autumn with 33% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 39.1 inches in Romeoville means that it is about average compared to other places in Illinois.

May is the rainiest month in Charleston with 11.7 days of rain, and September is the driest month with only 7.0 rainy days. There are 111.3 rainy days annually in Charleston, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 23% chance of a rainy day.

May is the rainiest month in Romeoville with 12.4 days of rain, and September is the driest month with only 7.8 rainy days. There are 124.6 rainy days annually in Romeoville, 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 Winter with only a 22% chance of a rainy day.

An annual snowfall of 15.1 inches in Charleston means that it is less snowy than most places in Illinois.

An annual snowfall of 30.1 inches in Romeoville means that it is snowier than most places in Illinois.
January is the snowiest month in Charleston with 6.2 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Romeoville with 9.8 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

Many people confuse Weather and Climate, but they are different. Weather refers to the conditions of the atmosphere over a short period of time, while Climate refers to the conditions of the atmosphere over a long period of time.

Weather, more specifically, refers to how the atmosphere behaves and its effects on life and human activities. Most people think of Weather in terms of what can be observed: temperature, humidity, precipitation, and cloudy/sunny conditions. Weather conditions constantly change on a minute-to-minute basis.

Climate is a record of the average weather conditions for a given place over a long period of time, often referred to as Climate Normals. A 30-year period of record is a common requirement to be considered a Climate Normal.

Reviews for Charleston    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Charleston

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Reviews for Romeoville    2 Reviews
Jill · Sherman Oaks, CA
re:
Over 16 years ago

Hi. I'd like to know if you still feel the same way about living in Broomfield. I went there this past July to check it out (along with Lafayette, Boulder (can't  More

   |    Reply
NC For Me · Apex, NC
re:
Over 16 years ago

Apex is perfect for what you are looking for. It's close enough to Raleigh, Durham, Chapel Hill to find a job and Cary the next town over, is a little more expensive but  More

   |    Reply

Start Your Review of Romeoville

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60446
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