2025 Compare Climate & Weather:
Iowa City, IA vs St. Louis, MO

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Highlights

On average, there are 202 sunny days per year in St. Louis. Iowa City averages 199 sunny days per year. The US average is 205 sunny days.

St. Louis, Missouri gets 42.2 inches of rain, on average, per year. Iowa City, Iowa gets 36.9 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. Iowa City averages 26.8 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

Iowa City, Iowa
Summer High: the July high is around 85.1 degrees
Winter Low: the January low is 13.3
Rain: averages 36.9 inches of rain a year
Snow: averages 26.8 inches of snow a year

BestPlaces Comfort Index

St. Louis

The 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.

Iowa City

The annual BestPlaces Comfort Index for Iowa City is 7.0 (10=best), which means it is more comfortable than most places in Iowa.

7 / 10

June, September and May are the most pleasant months in Iowa City, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Iowa City, IA	St. Louis, MO
January	30° / 13°	40° / 23°
February	35° / 18°	45° / 27°
March	48° / 28°	56° / 36°
April	62° / 40°	67° / 46°
May	73° / 50°	76° / 56°
June	82° / 60°	85° / 65°
July	85° / 64°	89° / 69°
August	83° / 62°	88° / 68°
September	76° / 53°	80° / 59°
October	64° / 41°	69° / 47°
November	48° / 30°	56° / 37°
December	33° / 17°	43° / 27°

Hot, Freezing, Rainy, Snowy Days: Iowa City / St. Louis

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	30 / 25	6 / 8	4 / 3
February	0 / 0	25 / 20	6 / 7	3 / 2
March	0 / 0	20 / 12	7 / 10	2 / 1
April	0 / 0	6 / 2	10 / 11	0 / 0
May	1 / 1	0 / 0	11 / 11	0 / 0
June	4 / 7	0 / 0	11 / 9	0 / 0
July	7 / 13	0 / 0	9 / 8	0 / 0
August	4 / 11	0 / 0	9 / 8	0 / 0
September	1 / 3	0 / 0	7 / 7	0 / 0
October	0 / 0	5 / 2	8 / 8	0 / 0
November	0 / 0	18 / 10	7 / 9	1 / 1
December	0 / 0	28 / 22	7 / 9	4 / 3

July is the hottest month for Iowa City with an average high temperature of 85.1°, which ranks it as warmer than most places in Iowa. In Iowa City, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Iowa City are September, June 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 Iowa City with an average of 13.3°. This is warmer than most places in Iowa.

January has the coldest nighttime temperatures for St. Louis with an average of 22.8°. This is warmer than most places in Missouri.

In Iowa City, there are 16.6 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

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 Iowa City, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

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 Iowa City, there are 12.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

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.

July is the wettest month in Iowa City with 4.8 inches of rain, and the driest month is January with 1.0 inches. The wettest season is Autumn with 39% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 36.9 inches in Iowa City means that it is wetter than most places in Iowa.

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 Iowa City with 11.2 days of rain, and February is the driest month with only 5.5 rainy days. There are 98.0 rainy days annually in Iowa City, which is about average compared to other places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 19% 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 26.8 inches in Iowa City means that it is less snowy than most places in Iowa.

An annual snowfall of 15.5 inches in St. Louis means that it is snowier than most places in Missouri.

December is the snowiest month in Iowa City with 8.1 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 Iowa City 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

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Reviews for St. Louis 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

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2025 Compare Climate & Weather:
Iowa City, IA vs St. Louis, MO

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Iowa City / St. Louis

January has the coldest nighttime temperatures for Iowa City with an average of 13.3°. This is warmer than most places in Iowa.

January has the coldest nighttime temperatures for St. Louis with an average of 22.8°. This is warmer than most places in Missouri.

In Iowa City, there are 16.6 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

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 Iowa City, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

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 Iowa City, there are 12.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

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.

An annual snowfall of 26.8 inches in Iowa City means that it is less snowy than most places in Iowa.

An annual snowfall of 15.5 inches in St. Louis means that it is snowier than most places in Missouri.

December is the snowiest month in Iowa City with 8.1 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?

Reviews for Iowa City 2 Reviews

Reviews for St. Louis 2 Reviews

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2025 Compare Climate & Weather:Iowa City, IA vs St. Louis, MO

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Iowa City / St. Louis

January has the coldest nighttime temperatures for Iowa City with an average of 13.3°. This is warmer than most places in Iowa.January has the coldest nighttime temperatures for St. Louis with an average of 22.8°. This is warmer than most places in Missouri.

In Iowa City, there are 16.6 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.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 Iowa City, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.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 Iowa City, there are 12.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.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.

An annual snowfall of 26.8 inches in Iowa City means that it is less snowy than most places in Iowa.An annual snowfall of 15.5 inches in St. Louis means that it is snowier than most places in Missouri.

December is the snowiest month in Iowa City with 8.1 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?

Reviews for Iowa City 2 Reviews

Reviews for St. Louis 2 Reviews

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Zips In Iowa City, Iowa

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2025 Compare Climate & Weather:
Iowa City, IA vs St. Louis, MO

January has the coldest nighttime temperatures for Iowa City with an average of 13.3°. This is warmer than most places in Iowa.

January has the coldest nighttime temperatures for St. Louis with an average of 22.8°. This is warmer than most places in Missouri.

In Iowa City, there are 16.6 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

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 Iowa City, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

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 Iowa City, there are 12.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

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.

An annual snowfall of 26.8 inches in Iowa City means that it is less snowy than most places in Iowa.

An annual snowfall of 15.5 inches in St. Louis means that it is snowier than most places in Missouri.

December is the snowiest month in Iowa City with 8.1 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.