2025 Compare Climate & Weather:
Missoula, MT vs Chehalis, WA

Highlights

On average, there are 136 sunny days per year in Chehalis. Missoula averages 159 sunny days per year. The US average is 205 sunny days.

Chehalis, Washington gets 51.7 inches of rain, on average, per year. Missoula, Montana gets 15.2 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Chehalis averages 2.4 inches of snow per year. Missoula averages 39.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Chehalis, Washington
Summer High: the July high is around 78.4 degrees
Winter Low: the January low is 34.3
Rain: averages 51.7 inches of rain a year
Snow: averages 2.4 inches of snow a year

Missoula, Montana
Summer High: the July high is around 84.6 degrees
Winter Low: the January low is 17.9
Rain: averages 15.2 inches of rain a year
Snow: averages 39.5 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Missoula is 6.6 (10=best), which means it is about average compared to other places in Montana.

Today's Weather - Missoula, MT

74°F

Today's Weather - Chehalis, WA

59°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Missoula / Chehalis

July is the hottest month for Missoula with an average high temperature of 84.6°, which ranks it as about average compared to other places in Montana. In Missoula, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Missoula are June, August and September.

August is the hottest month for Chehalis with an average high temperature of 79.5°, which ranks it as warmer than most places in Washington. In Chehalis, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Chehalis are July, August and September.

December has the coldest nighttime temperatures for Missoula with an average of 16.9°. This is warmer than most places in Montana.

December has the coldest nighttime temperatures for Chehalis with an average of 33.3°. This is about average compared to other places in Washington.

In Missoula, there are 19.9 days annually when the high temperature is over 90°, which is about average compared to other places in Montana.

In Chehalis, there are 7.1 days annually when the high temperature is over 90°, which is hotter than most places in Washington.

In Missoula, there are 166.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Montana.

In Chehalis, there are 58.3 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.

In Missoula, there are 6.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.

In Chehalis, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

June is the wettest month in Missoula with 2.2 inches of rain, and the driest month is February with 0.8 inches. The wettest season is Summer with 30% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 15.2 inches in Missoula means that it is wetter than most places in Montana.


November is the wettest month in Chehalis with 8.5 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 39% of yearly precipitation and 8% occurs in Autumn, which is the driest season. The annual rainfall of 51.7 inches in Chehalis means that it is wetter than most places in Washington.

December is the rainiest month in Missoula with 12.1 days of rain, and July is the driest month with only 6.9 rainy days. There are 120.4 rainy days annually in Missoula, which is rainier than most places in Montana. The rainiest season is Summer when it rains 28% of the time and the driest is Autumn with only a 22% chance of a rainy day.

November is the rainiest month in Chehalis with 20.4 days of rain, and August is the driest month with only 5.1 rainy days. There are 171.0 rainy days annually in Chehalis, which is rainier than most places in Washington. The rainiest season is Spring when it rains 33% of the time and the driest is Autumn with only a 12% chance of a rainy day.

An annual snowfall of 39.5 inches in Missoula means that it is about average compared to other places in Montana.

An annual snowfall of 2.4 inches in Chehalis means that it is less snowy than most places in Washington.

December is the snowiest month in Missoula with 11.1 inches of snow, and 7 months of the year have significant snowfall.

February is the snowiest month in Chehalis with 0.7 inches of snow, and 3 months of the year have significant snowfall.