2025 Compare Climate & Weather:
Polson, MT vs Westmont, IL

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Highlights

On average, there are 187 sunny days per year in Westmont. Polson averages 153 sunny days per year. The US average is 205 sunny days.

Westmont, Illinois gets 38.7 inches of rain, on average, per year. Polson, Montana gets 17.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Westmont averages 31.2 inches of snow per year. Polson averages 37.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Westmont, Illinois
Summer High: the July high is around 83.9 degrees
Winter Low: the January low is 15.7
Rain: averages 38.7 inches of rain a year
Snow: averages 31.2 inches of snow a year

Polson, Montana
Summer High: the July high is around 81.9 degrees
Winter Low: the January low is 22.8
Rain: averages 17.6 inches of rain a year
Snow: averages 37.3 inches of snow a year

BestPlaces Comfort Index

Westmont

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

Polson

The annual BestPlaces Comfort Index for Polson is 6.7 (10=best), which means it is about average compared to other places in Montana.

6.7 / 10

July, August and June are the most pleasant months in Polson, while December and January are the least comfortable months.

Average Monthly High / Low (°F)

Month	Polson, MT	Westmont, IL
January	34° / 23°	31° / 16°
February	38° / 23°	36° / 18°
March	47° / 29°	47° / 28°
April	57° / 35°	60° / 38°
May	65° / 42°	70° / 49°
June	72° / 48°	80° / 59°
July	82° / 54°	84° / 63°
August	82° / 53°	82° / 62°
September	70° / 45°	75° / 53°
October	56° / 36°	63° / 41°
November	42° / 29°	49° / 30°
December	33° / 22°	35° / 20°

Hot, Freezing, Rainy, Snowy Days: Polson / Westmont

Month	Hot Days	Freezing Days	Rainy Days	Snowy Days
January	0 / 0	26 / 27	10 / 10	6 / 6
February	0 / 0	24 / 25	8 / 8	4 / 4
March	0 / 0	21 / 21	9 / 10	3 / 3
April	0 / 0	10 / 7	9 / 11	1 / 0
May	0 / 0	2 / 0	11 / 12	0 / 0
June	0 / 2	0 / 0	12 / 11	0 / 0
July	5 / 4	0 / 0	6 / 10	0 / 0
August	4 / 3	0 / 0	6 / 10	0 / 0
September	0 / 1	1 / 0	7 / 8	0 / 0
October	0 / 0	8 / 5	9 / 10	0 / 0
November	0 / 0	19 / 19	11 / 10	3 / 1
December	0 / 0	27 / 28	10 / 11	6 / 5

July is the hottest month for Polson with an average high temperature of 81.9°, which ranks it as cooler than most places in Montana. In Polson, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Polson are August, July and June.

July is the hottest month for Westmont with an average high temperature of 83.9°, which ranks it as cooler than most places in Illinois. In Westmont, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Westmont are June, September and August.

December has the coldest nighttime temperatures for Polson with an average of 21.9°. This is one of the warmest places in Montana.

January has the coldest nighttime temperatures for Westmont with an average of 15.7°. This is colder than most places in Illinois.

In Polson, there are 9.8 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Westmont, there are 9.5 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Polson, there are 139.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Montana.

In Westmont, there are 132.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Polson, there are 3.1 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Montana.

In Westmont, there are 5.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

June is the wettest month in Polson with 2.6 inches of rain, and the driest month is February with 0.8 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 17.6 inches in Polson means that it is wetter than most places in Montana.

August is the wettest month in Westmont with 4.3 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 38.7 inches in Westmont means that it is about average compared to other places in Illinois.

June is the rainiest month in Polson with 11.5 days of rain, and July is the driest month with only 5.9 rainy days. There are 108.4 rainy days annually in Polson, which is rainier than most places in Montana. The rainiest season is Summer when it rains 27% of the time and the driest is Autumn with only a 22% chance of a rainy day.

May is the rainiest month in Westmont with 11.8 days of rain, and February is the driest month with only 8.2 rainy days. There are 120.2 rainy days annually in Westmont, which is rainier than most places in Illinois. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 23% chance of a rainy day.

An annual snowfall of 37.3 inches in Polson means that it is less snowy than most places in Montana.

An annual snowfall of 31.2 inches in Westmont means that it is snowier than most places in Illinois.

December is the snowiest month in Polson with 11.4 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Westmont with 10.4 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 Polson 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

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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 Westmont 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:
Polson, MT vs Westmont, IL

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Polson / Westmont

December has the coldest nighttime temperatures for Polson with an average of 21.9°. This is one of the warmest places in Montana.

January has the coldest nighttime temperatures for Westmont with an average of 15.7°. This is colder than most places in Illinois.

In Polson, there are 9.8 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Westmont, there are 9.5 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Polson, there are 139.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Montana.

In Westmont, there are 132.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Polson, there are 3.1 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Montana.

In Westmont, there are 5.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

An annual snowfall of 37.3 inches in Polson means that it is less snowy than most places in Montana.

An annual snowfall of 31.2 inches in Westmont means that it is snowier than most places in Illinois.

December is the snowiest month in Polson with 11.4 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Westmont with 10.4 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

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Reviews for Westmont 2 Reviews

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2025 Compare Climate & Weather:Polson, MT vs Westmont, IL

Highlights

Weather Highlights

BestPlaces Comfort Index

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Polson / Westmont

December has the coldest nighttime temperatures for Polson with an average of 21.9°. This is one of the warmest places in Montana.January has the coldest nighttime temperatures for Westmont with an average of 15.7°. This is colder than most places in Illinois.

In Polson, there are 9.8 days annually when the high temperature is over 90°, which is cooler than most places in Montana.In Westmont, there are 9.5 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Polson, there are 139.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Montana.In Westmont, there are 132.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Polson, there are 3.1 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Montana.In Westmont, there are 5.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

An annual snowfall of 37.3 inches in Polson means that it is less snowy than most places in Montana.An annual snowfall of 31.2 inches in Westmont means that it is snowier than most places in Illinois.

December is the snowiest month in Polson with 11.4 inches of snow, and 6 months of the year have significant snowfall.January is the snowiest month in Westmont with 10.4 inches of snow, and 6 months of the year have significant snowfall.

DID YOU KNOW?

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Reviews for Westmont 2 Reviews

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2025 Compare Climate & Weather:
Polson, MT vs Westmont, IL

December has the coldest nighttime temperatures for Polson with an average of 21.9°. This is one of the warmest places in Montana.

January has the coldest nighttime temperatures for Westmont with an average of 15.7°. This is colder than most places in Illinois.

In Polson, there are 9.8 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Westmont, there are 9.5 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Polson, there are 139.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Montana.

In Westmont, there are 132.1 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Illinois.

In Polson, there are 3.1 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Montana.

In Westmont, there are 5.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

An annual snowfall of 37.3 inches in Polson means that it is less snowy than most places in Montana.

An annual snowfall of 31.2 inches in Westmont means that it is snowier than most places in Illinois.

December is the snowiest month in Polson with 11.4 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Westmont with 10.4 inches of snow, and 6 months of the year have significant snowfall.