2024 Compare Climate & Weather:
St. Louis, MO vs Naperville, IL
Change Cities
Highlights
On average, there are 189 sunny days per year in Naperville. St. Louis averages 202 sunny days per year. The US average is 205 sunny days.
Naperville, Illinois gets 38.6 inches of rain, on average, per year. St. Louis, Missouri gets 42.2 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. St. Louis averages 15.5 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
St. Louis, Missouri
Summer High: the July high is around 88.5 degrees
Winter Low: the January low is 22.8
Rain: averages 42.2 inches of rain a year
Snow: averages 15.5 inches of snow a year
BESTPLACES COMFORT INDEX
NapervilleThe annual BestPlaces Comfort Index for Naperville 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 Naperville, while January and December are the least comfortable months.
St. LouisThe annual BestPlaces Comfort Index for St. Louis is 7.2 (10=best), which means it is more comfortable than most places in Missouri.
7.2 / 10
September, May and October are the most pleasant months in St. Louis, while January and December are the least comfortable months.
Today's Weather - St. Louis, MO
5 AM PST
Sunny
60°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Today | Sunny | 80° / 58° | NW 5 to 14 mph |
| Wednesday | Sunny | 77° / 56° | N 3 to 7 mph |
| Thursday | Sunny | 79° / 58° | E 6 mph |
| Friday | Chance Showers And Thunderstorms | 78° / 60° | SE 7 to 10 mph |
| Saturday | Chance Showers And Thunderstorms | 82° / 65° | S 7 mph |
| Sunday | Mostly Sunny then Chance Showers And Thunderstorms | 86° / 69° | S 2 to 7 mph |
| Monday | Chance Showers And Thunderstorms | 87° / 69° | S 5 to 8 mph |
Today's Weather - Naperville, IL
5 AM PST
Partly Sunny then Isolated Showers And Thunderstorms
54°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| Today | Partly Sunny then Isolated Showers And Thunderstorms | 72° / 52° | NW 5 to 10 mph |
| Wednesday | Mostly Sunny | 69° / 46° | NNE 10 to 15 mph |
| Thursday | Sunny | 71° / 47° | NE 5 mph |
| Friday | Mostly Sunny | 77° / 55° | SE 5 to 10 mph |
| Saturday | Chance Showers And Thunderstorms | 77° / 59° | SSE 5 to 10 mph |
| Sunday | Mostly Sunny then Slight Chance Showers And Thunderstorms | 84° / 64° | S 5 to 10 mph |
| Monday | Chance Showers And Thunderstorms | 83° / 64° | S 5 to 10 mph |
Average Monthly High / Low (°F)
| Month | St. Louis, MO | Naperville, IL |
|---|
| January | 40° / 23° | 31° / 15° |
| February | 45° / 27° | 35° / 18° |
| March | 56° / 36° | 47° / 27° |
| April | 67° / 46° | 60° / 38° |
| May | 76° / 56° | 70° / 48° |
| June | 85° / 65° | 80° / 59° |
| July | 89° / 69° | 84° / 63° |
| August | 88° / 68° | 81° / 61° |
| September | 80° / 59° | 75° / 52° |
| October | 69° / 47° | 63° / 41° |
| November | 56° / 37° | 48° / 30° |
| December | 43° / 27° | 35° / 19° |
Hot, Freezing, Rainy, Snowy Days: St. Louis / Naperville
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 25 / 28 | 8 / 10 | 3 / 6 |
| February | 0 / 0 | 20 / 25 | 7 / 9 | 2 / 5 |
| March | 0 / 0 | 12 / 22 | 10 / 11 | 1 / 3 |
| April | 0 / 0 | 2 / 8 | 11 / 11 | 0 / 0 |
| May | 1 / 0 | 0 / 0 | 11 / 12 | 0 / 0 |
| June | 7 / 2 | 0 / 0 | 9 / 11 | 0 / 0 |
| July | 13 / 3 | 0 / 0 | 8 / 10 | 0 / 0 |
| August | 11 / 2 | 0 / 0 | 8 / 10 | 0 / 0 |
| September | 3 / 1 | 0 / 0 | 7 / 8 | 0 / 0 |
| October | 0 / 0 | 2 / 6 | 8 / 9 | 0 / 0 |
| November | 0 / 0 | 10 / 19 | 9 / 10 | 1 / 1 |
| December | 0 / 0 | 22 / 28 | 9 / 11 | 3 / 6 |
July is the hottest month for St. Louis with an average high temperature of 88.5°, which ranks it as about average compared to other places in Missouri. In St. Louis, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for St. Louis are May, September and June.
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 St. Louis with an average of 22.8°. This is warmer than most places in Missouri.
January has the coldest nighttime temperatures for Naperville with an average of 15.1°. This is colder than most places in Illinois.
In St. Louis, there are 36.0 days annually when the high temperature is over 90°, which is hotter than most places in Missouri.
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 St. Louis, there are 91.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.
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 St. Louis, there are 1.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.
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.
May is the wettest month in St. Louis with 4.8 inches of rain, and the driest month is February with 2.3 inches. The wettest season is Summer with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 42.2 inches in St. Louis means that it is drier than most places in Missouri.
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 St. Louis with 11.3 days of rain, and September is the driest month with only 7.0 rainy days. There are 105.3 rainy days annually in St. Louis, which is rainier than most places in Missouri. The rainiest season is Summer when it rains 30% 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 15.5 inches in St. Louis means that it is snowier than most places in Missouri.
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 St. Louis with 4.9 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.
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 St. Louis 
2 Reviews
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
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
Start Your Review of St. Louis
Reviews for Naperville 2 Reviews
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
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
Start Your Review of Naperville
Most Recent Searches On Compare Climate & Weather
| Compare City | Compared To This City | |
| Zeeland, Michigan | Portland, Maine | Compare |
| Aurora, Illinois | Huntersville, North Carolina | Compare |
| Columbus, Ohio | Lynchburg, Tennessee | Compare |
| Seattle, Washington | Cleveland, Ohio | Compare |
| Reno, Nevada | Loyalton, California | Compare |
| Hagerstown, Maryland | New Castle, Kentucky | Compare |
| Chicago, Illinois | Pittsburgh, Pennsylvania | Compare |
| Orlando, Florida | Austin, Texas | Compare |
| Greenville, South Carolina | Dayton, Ohio | Compare |
| Asheville, North Carolina | Black Mountain, North Carolina | Compare |
| Minneapolis, Minnesota | Bar Harbor, Maine | Compare |
| Mountain City, Tennessee | Brevard, North Carolina | Compare |
| Aberdeen, North Carolina | Charlotte, North Carolina | Compare |
| Lacey, Washington | Roseville, California | Compare |
| Pinedale, Wyoming | Coleman, Michigan | Compare |
| Liberty Lake, Washington | Coeur D'alene, Idaho | Compare |
| Fayetteville, Arkansas | Lyndonville, Vermont | Compare |
| Las Vegas, Nevada | Austin, Texas | Compare |
| Las Vegas, Nevada | Austin, Texas | Compare |
| Lake Oswego, Oregon | Bellingham, Washington | Compare |