2025 Compare Climate & Weather:
Arnold, MO vs Smithton, IL

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Highlights

On average, there are 201 sunny days per year in Smithton. Arnold averages 203 sunny days per year. The US average is 205 sunny days.

Smithton, Illinois gets 42.9 inches of rain, on average, per year. Arnold, Missouri gets 43.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Smithton averages 12.1 inches of snow per year. Arnold averages 12.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Smithton, Illinois
Summer High: the July high is around 89 degrees
Winter Low: the January low is 23
Rain: averages 42.9 inches of rain a year
Snow: averages 12.1 inches of snow a year

Arnold, Missouri
Summer High: the July high is around 88.3 degrees
Winter Low: the January low is 22.6
Rain: averages 43.9 inches of rain a year
Snow: averages 12.3 inches of snow a year

BestPlaces Comfort Index

Smithton

The annual BestPlaces Comfort Index for Smithton 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 Smithton, while January and December are the least comfortable months.

Arnold

The annual BestPlaces Comfort Index for Arnold is 7.3 (10=best), which means it is one of the most pleasant places in Missouri.

7.3 / 10

September, May and October are the most pleasant months in Arnold, while January and December are the least comfortable months.

Average Monthly High / Low (°F)

Month	Arnold, MO	Smithton, IL
January	40° / 23°	41° / 23°
February	45° / 26°	46° / 27°
March	56° / 35°	57° / 35°
April	67° / 45°	68° / 45°
May	76° / 55°	77° / 55°
June	85° / 64°	86° / 64°
July	88° / 68°	89° / 68°
August	88° / 67°	88° / 66°
September	80° / 58°	81° / 57°
October	69° / 47°	70° / 46°
November	56° / 37°	56° / 37°
December	43° / 26°	43° / 26°

Hot, Freezing, Rainy, Snowy Days: Arnold / Smithton

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	25 / 25	7 / 7	2 / 2
February	0 / 0	20 / 20	7 / 7	2 / 2
March	0 / 0	13 / 12	9 / 9	1 / 1
April	0 / 0	3 / 2	10 / 10	0 / 0
May	1 / 1	0 / 0	11 / 11	0 / 0
June	7 / 9	0 / 0	9 / 9	0 / 0
July	13 / 14	0 / 0	8 / 8	0 / 0
August	11 / 12	0 / 0	7 / 7	0 / 0
September	3 / 4	0 / 0	7 / 7	0 / 0
October	0 / 0	2 / 2	8 / 8	0 / 0
November	0 / 0	10 / 11	8 / 9	0 / 0
December	0 / 0	22 / 22	8 / 8	1 / 2

July is the hottest month for Arnold with an average high temperature of 88.3°, which ranks it as about average compared to other places in Missouri. In Arnold, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Arnold are May, September and June.

July is the hottest month for Smithton with an average high temperature of 89.0°, which ranks it as one of the hottest places in Illinois. In Smithton, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Smithton are May, September and June.

January has the coldest nighttime temperatures for Arnold with an average of 22.6°. This is warmer than most places in Missouri.

January has the coldest nighttime temperatures for Smithton with an average of 23.0°. This is one of the warmest places in Illinois.

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

In Smithton, there are 40.0 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Arnold, there are 92.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Smithton, there are 94.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Arnold, there are 2.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.

In Smithton, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

May is the wettest month in Arnold with 4.9 inches of rain, and the driest month is February with 2.4 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 43.9 inches in Arnold means that it is about average compared to other places in Missouri.

May is the wettest month in Smithton with 4.9 inches of rain, and the driest month is January with 2.4 inches. The wettest season is Summer with 28% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 42.9 inches in Smithton means that it is wetter than most places in Illinois.

May is the rainiest month in Arnold with 10.6 days of rain, and September is the driest month with only 6.5 rainy days. There are 96.8 rainy days annually in Arnold, which is about average compared to other places in Missouri. 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 Smithton with 11.0 days of rain, and February is the driest month with only 6.6 rainy days. There are 99.4 rainy days annually in Smithton, 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.

An annual snowfall of 12.3 inches in Arnold means that it is less snowy than most places in Missouri.

An annual snowfall of 12.1 inches in Smithton means that it is less snowy than most places in Illinois.

January is the snowiest month in Arnold with 3.7 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Smithton with 4.0 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 Arnold 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 Smithton 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 Smithton

See all reviews

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2025 Compare Climate & Weather:
Arnold, MO vs Smithton, IL

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Arnold / Smithton

January has the coldest nighttime temperatures for Arnold with an average of 22.6°. This is warmer than most places in Missouri.

January has the coldest nighttime temperatures for Smithton with an average of 23.0°. This is one of the warmest places in Illinois.

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

In Smithton, there are 40.0 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Arnold, there are 92.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Smithton, there are 94.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Arnold, there are 2.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.

In Smithton, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

An annual snowfall of 12.3 inches in Arnold means that it is less snowy than most places in Missouri.

An annual snowfall of 12.1 inches in Smithton means that it is less snowy than most places in Illinois.

January is the snowiest month in Arnold with 3.7 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Smithton with 4.0 inches of snow, and 4 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Arnold 2 Reviews

Reviews for Smithton 2 Reviews

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2025 Compare Climate & Weather:Arnold, MO vs Smithton, IL

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Arnold / Smithton

January has the coldest nighttime temperatures for Arnold with an average of 22.6°. This is warmer than most places in Missouri.January has the coldest nighttime temperatures for Smithton with an average of 23.0°. This is one of the warmest places in Illinois.

In Arnold, there are 34.6 days annually when the high temperature is over 90°, which is hotter than most places in Missouri.In Smithton, there are 40.0 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Arnold, there are 92.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.In Smithton, there are 94.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Arnold, there are 2.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.In Smithton, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

An annual snowfall of 12.3 inches in Arnold means that it is less snowy than most places in Missouri.An annual snowfall of 12.1 inches in Smithton means that it is less snowy than most places in Illinois.

January is the snowiest month in Arnold with 3.7 inches of snow, and 5 months of the year have significant snowfall.January is the snowiest month in Smithton with 4.0 inches of snow, and 4 months of the year have significant snowfall.

DID YOU KNOW?

Reviews for Arnold 2 Reviews

Reviews for Smithton 2 Reviews

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Zips In Arnold, Missouri

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2025 Compare Climate & Weather:
Arnold, MO vs Smithton, IL

January has the coldest nighttime temperatures for Arnold with an average of 22.6°. This is warmer than most places in Missouri.

January has the coldest nighttime temperatures for Smithton with an average of 23.0°. This is one of the warmest places in Illinois.

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

In Smithton, there are 40.0 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Arnold, there are 92.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Smithton, there are 94.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Arnold, there are 2.2 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Missouri.

In Smithton, there are 1.8 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

An annual snowfall of 12.3 inches in Arnold means that it is less snowy than most places in Missouri.

An annual snowfall of 12.1 inches in Smithton means that it is less snowy than most places in Illinois.

January is the snowiest month in Arnold with 3.7 inches of snow, and 5 months of the year have significant snowfall.

January is the snowiest month in Smithton with 4.0 inches of snow, and 4 months of the year have significant snowfall.