2025 Compare Climate & Weather:
Polson, MT vs Castle Pines, CO

Highlights

On average, there are 245 sunny days per year in Castle Pines. Polson averages 153 sunny days per year. The US average is 205 sunny days.

Castle Pines, Colorado gets 18.1 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.

Castle Pines averages 75.5 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

Castle Pines, Colorado
Summer High: the July high is around 85.4 degrees
Winter Low: the January low is 18.5
Rain: averages 18.1 inches of rain a year
Snow: averages 75.5 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

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

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

Today's Weather - Polson, MT

70°F

Today's Weather - Castle Pines, CO

68°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Polson / Castle Pines

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 Castle Pines with an average high temperature of 85.4°, which ranks it as about average compared to other places in Colorado. In Castle Pines, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Castle Pines 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.

December has the coldest nighttime temperatures for Castle Pines with an average of 18.2°. This is one of the warmest places in Colorado.

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

In Castle Pines, there are 14.8 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

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 Castle Pines, there are 156.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

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 Castle Pines, there are 5.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

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.


July is the wettest month in Castle Pines with 2.8 inches of rain, and the driest month is February with 0.5 inches. The wettest season is Autumn with 43% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Castle Pines means that it is wetter than most places in Colorado.

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.

August is the rainiest month in Castle Pines with 10.2 days of rain, and January is the driest month with only 3.4 rainy days. There are 72.6 rainy days annually in Castle Pines, which is less rainy than most places in Colorado. The rainiest season is Autumn when it rains 37% of the time and the driest is Spring with only a 15% 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 75.5 inches in Castle Pines means that it is snowier than most places in Colorado.

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

March is the snowiest month in Castle Pines with 16.3 inches of snow, and 9 months of the year have significant snowfall.