2025 Compare Climate & Weather:
Plains, MT vs Thompson Falls, MT

Highlights

On average, there are 158 sunny days per year in Thompson Falls. Plains averages 154 sunny days per year. The US average is 205 sunny days.

Thompson Falls, Montana gets 22.7 inches of rain, on average, per year. Plains, Montana gets 18.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Thompson Falls averages 42 inches of snow per year. Plains averages 39.4 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Thompson Falls, Montana
Summer High: the July high is around 86 degrees
Winter Low: the January low is 22.8
Rain: averages 22.7 inches of rain a year
Snow: averages 42 inches of snow a year

Plains, Montana
Summer High: the July high is around 86 degrees
Winter Low: the January low is 20.9
Rain: averages 18.9 inches of rain a year
Snow: averages 39.4 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Thompson Falls is 6.5 (10=best), which means it is less comfortable than most places in Montana.

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

Today's Weather - Plains, MT

84°F

Today's Weather - Thompson Falls, MT

79°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Plains / Thompson Falls

July is the hottest month for Plains with an average high temperature of 86.0°, which ranks it as warmer than most places in Montana. In Plains, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Plains are June, September and August.

August is the hottest month for Thompson Falls with an average high temperature of 86.3°, which ranks it as warmer than most places in Montana. In Thompson Falls, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Thompson Falls are June, September and July.

December has the coldest nighttime temperatures for Plains with an average of 19.4°. This is warmer than most places in Montana.

December has the coldest nighttime temperatures for Thompson Falls with an average of 21.7°. This is one of the warmest places in Montana.

In Plains, there are 26.5 days annually when the high temperature is over 90°, which is hotter than most places in Montana.

In Thompson Falls, there are 28.6 days annually when the high temperature is over 90°, which is hotter than most places in Montana.

In Plains, there are 164.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Montana.

In Thompson Falls, there are 151.0 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Montana.

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

In Thompson Falls, there are 3.6 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Montana.

November is the wettest month in Plains with 2.3 inches of rain, and the driest month is July with 1.0 inches. The wettest season is Winter with 27% of yearly precipitation and 22% occurs in Autumn, which is the driest season. The annual rainfall of 18.9 inches in Plains means that it is wetter than most places in Montana.


November is the wettest month in Thompson Falls with 2.9 inches of rain, and the driest month is July with 1.1 inches. The wettest season is Spring with 30% of yearly precipitation and 19% occurs in Autumn, which is the driest season. The annual rainfall of 22.7 inches in Thompson Falls means that it is one of the wettest places in Montana.

November is the rainiest month in Plains with 14.3 days of rain, and August is the driest month with only 6.3 rainy days. There are 129.5 rainy days annually in Plains, 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 19% chance of a rainy day.

November is the rainiest month in Thompson Falls with 15.8 days of rain, and August is the driest month with only 6.2 rainy days. There are 140.9 rainy days annually in Thompson Falls, which is one of the rainiest places in Montana. The rainiest season is Spring when it rains 30% of the time and the driest is Autumn with only a 18% chance of a rainy day.

An annual snowfall of 39.4 inches in Plains means that it is about average compared to other places in Montana.

An annual snowfall of 42.0 inches in Thompson Falls means that it is about average compared to other places in Montana.

December is the snowiest month in Plains with 13.0 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Thompson Falls with 15.0 inches of snow, and 5 months of the year have significant snowfall.