2024 Compare Climate & Weather:
Chicago, IL vs St. Louis, MO
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Highlights
On average, there are 202 sunny days per year in St. Louis. Chicago averages 189 sunny days per year. The US average is 205 sunny days.
St. Louis, Missouri gets 42.2 inches of rain, on average, per year. Chicago, Illinois gets 38.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.
St. Louis averages 15.5 inches of snow per year. Chicago averages 35.1 inches of snow per year. The US average is 27.8 inches of snow per year.
Weather Highlights
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
Chicago, Illinois
Summer High: the July high is around 83.9 degrees
Winter Low: the January low is 19.2
Rain: averages 38.2 inches of rain a year
Snow: averages 35.1 inches of snow a year
BESTPLACES COMFORT INDEX
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.
ChicagoThe annual BestPlaces Comfort Index for Chicago is 7.0 (10=best), which means it is about average compared to other places in Illinois.
7 / 10
September, June and August are the most pleasant months in Chicago, while January and December are the least comfortable months.
Today's Weather - Chicago, IL
4 PM PST
Sunny
74°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| This Afternoon | Sunny | 77° / 60° | E 10 mph |
| Friday | Partly Sunny then Periods Of Showers And Thunderstorms | 82° / 59° | SSE 5 to 15 mph |
| Saturday | Sunny | 72° / 58° | NNE 5 to 10 mph |
| Sunday | Showers And Thunderstorms | 73° / 59° | SE 10 to 15 mph |
| Memorial Day | Chance Rain Showers | 69° / 56° | WNW 15 mph |
| Tuesday | Chance Rain Showers | 73° / 54° | NW 10 to 15 mph |
| Wednesday | Sunny | 65° / 53° | NNW 10 mph |
Today's Weather - St. Louis, MO
4 PM PST
Partly Sunny
79°F
| DAY | DESCRIPTION | HIGH / LOW | WIND |
|---|
| This Afternoon | Partly Sunny | 80° / 67° | S 7 mph |
| Friday | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 85° / 63° | S 8 to 15 mph |
| Saturday | Sunny | 82° / 68° | NE 3 to 7 mph |
| Sunday | Showers And Thunderstorms | 88° / 65° | S 8 to 12 mph |
| Memorial Day | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 79° / 60° | NW 8 to 12 mph |
| Tuesday | Sunny | 80° / 59° | NW 7 to 10 mph |
| Wednesday | Sunny | 79° / 58° | NW 7 mph |
Average Monthly High / Low (°F)
| Month | Chicago, IL | St. Louis, MO |
|---|
| January | 32° / 19° | 40° / 23° |
| February | 37° / 23° | 45° / 27° |
| March | 47° / 31° | 56° / 36° |
| April | 58° / 41° | 67° / 46° |
| May | 69° / 51° | 76° / 56° |
| June | 79° / 61° | 85° / 65° |
| July | 84° / 68° | 89° / 69° |
| August | 82° / 67° | 88° / 68° |
| September | 75° / 59° | 80° / 59° |
| October | 63° / 47° | 69° / 47° |
| November | 49° / 36° | 56° / 37° |
| December | 36° / 24° | 43° / 27° |
Hot, Freezing, Rainy, Snowy Days: Chicago / St. Louis
| Month | Hot Days | Freezing Days | Rainy Days | Snowy Days |
|---|
| January | 0 / 0 | 27 / 25 | 10 / 8 | 7 / 3 |
| February | 0 / 0 | 23 / 20 | 8 / 7 | 5 / 2 |
| March | 0 / 0 | 17 / 12 | 11 / 10 | 4 / 1 |
| April | 0 / 0 | 3 / 2 | 11 / 11 | 1 / 0 |
| May | 1 / 1 | 0 / 0 | 12 / 11 | 0 / 0 |
| June | 3 / 7 | 0 / 0 | 10 / 9 | 0 / 0 |
| July | 6 / 13 | 0 / 0 | 10 / 8 | 0 / 0 |
| August | 4 / 11 | 0 / 0 | 10 / 8 | 0 / 0 |
| September | 1 / 3 | 0 / 0 | 9 / 7 | 0 / 0 |
| October | 0 / 0 | 1 / 2 | 10 / 8 | 0 / 0 |
| November | 0 / 0 | 10 / 10 | 11 / 9 | 2 / 1 |
| December | 0 / 0 | 24 / 22 | 11 / 9 | 6 / 3 |
July is the hottest month for Chicago with an average high temperature of 83.9°, which ranks it as cooler than most places in Illinois. In Chicago, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chicago are June, September and August.
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.
January has the coldest nighttime temperatures for Chicago with an average of 19.2°. This is warmer than most places in Illinois.
January has the coldest nighttime temperatures for St. Louis with an average of 22.8°. This is warmer than most places in Missouri.
In Chicago, there are 13.6 days annually when the high temperature is over 90°, which is cooler 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 Chicago, there are 103.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most 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 Chicago, there are 4.0 days annually when the nighttime low temperature falls below zero°, which is warmer 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.
August is the wettest month in Chicago with 4.2 inches of rain, and the driest month is January with 2.0 inches. The wettest season is Autumn with 31% of yearly precipitation and 17% occurs in Spring, which is the driest season. The annual rainfall of 38.2 inches in Chicago means that it is drier than most 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.
May is the rainiest month in Chicago with 11.5 days of rain, and February is the driest month with only 8.4 rainy days. There are 124.8 rainy days annually in Chicago, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 24% chance of a rainy day.
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.
An annual snowfall of 35.1 inches in Chicago means that it is one of the snowiest places in Illinois.
An annual snowfall of 15.5 inches in St. Louis means that it is snowier than most places in Missouri.
January is the snowiest month in Chicago with 11.0 inches of snow, and 6 months of the year have significant snowfall.
January is the snowiest month in St. Louis with 4.9 inches of snow, and 5 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 Chicago 
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
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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
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