2025 Compare Climate & Weather:
Boulder, CO vs Kalispell, MT

Highlights

On average, there are 151 sunny days per year in Kalispell. Boulder averages 245 sunny days per year. The US average is 205 sunny days.

Kalispell, Montana gets 18 inches of rain, on average, per year. Boulder, Colorado gets 18.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Kalispell averages 55.9 inches of snow per year. Boulder averages 71.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Kalispell, Montana
Summer High: the July high is around 80.5 degrees
Winter Low: the January low is 17
Rain: averages 18 inches of rain a year
Snow: averages 55.9 inches of snow a year

Boulder, Colorado
Summer High: the July high is around 88.1 degrees
Winter Low: the January low is 18.9
Rain: averages 18.1 inches of rain a year
Snow: averages 71.1 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Kalispell is 6.3 (10=best), which means it is less comfortable than most places in Montana.

The annual BestPlaces Comfort Index for Boulder is 7.1 (10=best), which means it is about average compared to other places in Colorado.

Today's Weather - Boulder, CO

54°F

Today's Weather - Kalispell, MT

44°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Boulder / Kalispell

July is the hottest month for Boulder with an average high temperature of 88.1°, which ranks it as about average compared to other places in Colorado. In Boulder, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Boulder are September, June and May.

August is the hottest month for Kalispell with an average high temperature of 80.8°, which ranks it as cooler than most places in Montana. In Kalispell, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Kalispell are July, August and June.

December has the coldest nighttime temperatures for Boulder with an average of 18.3°. This is one of the warmest places in Colorado.

December has the coldest nighttime temperatures for Kalispell with an average of 16.8°. This is warmer than most places in Montana.

In Boulder, there are 32.4 days annually when the high temperature is over 90°, which is about average compared to other places in Colorado.

In Kalispell, there are 8.8 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Boulder, there are 151.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In Kalispell, there are 176.0 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Montana.

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

In Kalispell, there are 8.8 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.

May is the wettest month in Boulder with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Boulder means that it is wetter than most places in Colorado.


June is the wettest month in Kalispell with 2.8 inches of rain, and the driest month is February with 1.0 inches. The wettest season is Autumn with 30% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 18.0 inches in Kalispell means that it is wetter than most places in Montana.

May is the rainiest month in Boulder with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 88.0 rainy days annually in Boulder, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 17% chance of a rainy day.

January is the rainiest month in Kalispell with 13.6 days of rain, and August is the driest month with only 7.0 rainy days. There are 128.5 rainy days annually in Kalispell, which is one of the rainiest places in Montana. The rainiest season is Spring when it rains 29% of the time and the driest is Autumn with only a 22% chance of a rainy day.

An annual snowfall of 71.1 inches in Boulder means that it is snowier than most places in Colorado.

An annual snowfall of 55.9 inches in Kalispell means that it is snowier than most places in Montana.

March is the snowiest month in Boulder with 14.3 inches of snow, and 9 months of the year have significant snowfall.

December is the snowiest month in Kalispell with 17.7 inches of snow, and 7 months of the year have significant snowfall.