2025 Compare Climate & Weather:
Portland, OR vs Hamilton, MT

Highlights

On average, there are 158 sunny days per year in Hamilton. Portland averages 144 sunny days per year. The US average is 205 sunny days.

Hamilton, Montana gets 13.1 inches of rain, on average, per year. Portland, Oregon gets 42.8 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Hamilton averages 32.1 inches of snow per year. Portland averages 2.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Hamilton, Montana
Summer High: the July high is around 84.2 degrees
Winter Low: the January low is 18.8
Rain: averages 13.1 inches of rain a year
Snow: averages 32.1 inches of snow a year

Portland, Oregon
Summer High: the July high is around 80.5 degrees
Winter Low: the January low is 36.4
Rain: averages 42.8 inches of rain a year
Snow: averages 2.6 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Hamilton is 6.8 (10=best), which means it is more comfortable than most places in Montana.

The annual BestPlaces Comfort Index for Portland is 7.5 (10=best), which means it is more comfortable than most places in Oregon.

Today's Weather - Portland, OR

60°F

Today's Weather - Hamilton, MT

55°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Portland / Hamilton

August is the hottest month for Portland with an average high temperature of 81.1°, which ranks it as cooler than most places in Oregon. In Portland, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Portland are September, July and August.

July is the hottest month for Hamilton with an average high temperature of 84.2°, which ranks it as about average compared to other places in Montana. In Hamilton, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hamilton are June, August and September.

December has the coldest nighttime temperatures for Portland with an average of 35.6°. This is warmer than most places in Oregon.

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

In Portland, there are 11.6 days annually when the high temperature is over 90°, which is cooler than most places in Oregon.

In Hamilton, there are 15.4 days annually when the high temperature is over 90°, which is cooler than most places in Montana.

In Portland, there are 29.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Oregon.

In Hamilton, there are 169.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Montana.

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

In Hamilton, there are 7.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Montana.

December is the wettest month in Portland with 6.8 inches of rain, and the driest month is July with 0.7 inches. The wettest season is Spring with 41% of yearly precipitation and 7% occurs in Autumn, which is the driest season. The annual rainfall of 42.8 inches in Portland means that it is about average compared to other places in Oregon.


June is the wettest month in Hamilton with 1.7 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 29% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 13.1 inches in Hamilton means that it is drier than most places in Montana.

November is the rainiest month in Portland with 19.3 days of rain, and August is the driest month with only 3.7 rainy days. There are 155.9 rainy days annually in Portland, which is rainier than most places in Oregon. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 11% chance of a rainy day.

June is the rainiest month in Hamilton with 11.0 days of rain, and July is the driest month with only 6.6 rainy days. There are 106.4 rainy days annually in Hamilton, 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 24% chance of a rainy day.

An annual snowfall of 2.6 inches in Portland means that it is less snowy than most places in Oregon.

An annual snowfall of 32.1 inches in Hamilton means that it is less snowy than most places in Montana.

December is the snowiest month in Portland with 0.9 inches of snow, and 3 months of the year have significant snowfall.

December is the snowiest month in Hamilton with 9.4 inches of snow, and 6 months of the year have significant snowfall.