The remote server returned an error: (400) Bad Request.The remote server returned an error: (400) Bad Request. 2025 Compare Climate & Weather: Granite City, IL vs Union, MO

2025 Compare Climate & Weather:
Granite City, IL vs Union, MO

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Highlights

On average, there are 200 sunny days per year in Union. Granite City averages 204 sunny days per year. The US average is 205 sunny days.

Union, Missouri gets 43.8 inches of rain, on average, per year. Granite City, Illinois gets 41.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Union averages 12.6 inches of snow per year. Granite City averages 14.8 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Union, Missouri
Summer High: the July high is around 89 degrees
Winter Low: the January low is 21.7
Rain: averages 43.8 inches of rain a year
Snow: averages 12.6 inches of snow a year

Granite City, Illinois
Summer High: the July high is around 88.4 degrees
Winter Low: the January low is 22.4
Rain: averages 41.8 inches of rain a year
Snow: averages 14.8 inches of snow a year

BestPlaces Comfort Index
Union

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

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

Granite City

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

7.2 / 10
September, May and October are the most pleasant months in Granite City, while January and December are the least comfortable months.

Average Monthly High / Low (°F)
MonthGranite City, ILUnion, MO
January40° / 22°41° / 22°
February45° / 26°47° / 25°
March56° / 35°57° / 34°
April67° / 45°69° / 44°
May76° / 56°77° / 54°
June85° / 65°85° / 63°
July88° / 69°89° / 67°
August88° / 67°88° / 65°
September80° / 58°80° / 56°
October69° / 46°69° / 45°
November56° / 36°57° / 35°
December43° / 26°44° / 25°
Hot, Freezing, Rainy, Snowy Days: Granite City / Union
MonthHot DaysFreezing DaysRainy DaysSnowy Days
January0 / 025 / 257 / 83 / 2
February0 / 020 / 217 / 73 / 2
March0 / 012 / 1410 / 101 / 1
April0 / 02 / 310 / 110 / 0
May1 / 10 / 011 / 120 / 0
June7 / 70 / 09 / 100 / 0
July13 / 140 / 08 / 80 / 0
August10 / 130 / 08 / 80 / 0
September3 / 40 / 07 / 80 / 0
October0 / 02 / 38 / 90 / 0
November0 / 010 / 129 / 90 / 0
December0 / 022 / 239 / 83 / 2
July is the hottest month for Granite City with an average high temperature of 88.4°, which ranks it as one of the hottest places in Illinois. In Granite City, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Granite City are May, September and June.

July is the hottest month for Union with an average high temperature of 89.0°, which ranks it as warmer than most places in Missouri. In Union, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Union are May, September and June.
January has the coldest nighttime temperatures for Granite City with an average of 22.4°. This is one of the warmest places in Illinois.

January has the coldest nighttime temperatures for Union with an average of 21.7°. This is warmer than most places in Missouri.

In Granite City, there are 34.6 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

In Union, there are 38.3 days annually when the high temperature is over 90°, which is hotter than most places in Missouri.

In Granite City, there are 93.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Union, there are 101.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Granite City, there are 1.5 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

In Union, there are 2.7 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Missouri.

May is the wettest month in Granite City with 5.1 inches of rain, and the driest month is January with 2.4 inches. The wettest season is Summer with 29% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 41.8 inches in Granite City means that it is wetter than most places in Illinois.


May is the wettest month in Union with 4.9 inches of rain, and the driest month is February with 2.4 inches. The wettest season is Summer with 28% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 43.8 inches in Union means that it is about average compared to other places in Missouri.

May is the rainiest month in Granite City with 11.3 days of rain, and September is the driest month with only 6.8 rainy days. There are 103.3 rainy days annually in Granite City, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 22% chance of a rainy day.

May is the rainiest month in Union with 12.1 days of rain, and February is the driest month with only 7.4 rainy days. There are 107.4 rainy days annually in Union, which is one of the rainiest places in Missouri. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 14.8 inches in Granite City means that it is less snowy than most places in Illinois.

An annual snowfall of 12.6 inches in Union means that it is about average compared to other places in Missouri.
January is the snowiest month in Granite City with 4.8 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Union with 3.9 inches of snow, and 4 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 Granite 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

Start Your Review of Granite City

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Reviews for Union    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 Union

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Zips In Granite City, Illinois
62040
Zips In UNION, MISSOURI
63084
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