2025 Compare Climate & Weather:
Portland, OR vs Bismarck, ND

Highlights

On average, there are 202 sunny days per year in Bismarck. Portland averages 144 sunny days per year. The US average is 205 sunny days.

Bismarck, North Dakota gets 18.5 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.

Bismarck averages 46.2 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

Bismarck, North Dakota
Summer High: the July high is around 83.6 degrees
Winter Low: the January low is 2.2
Rain: averages 18.5 inches of rain a year
Snow: averages 46.2 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 Bismarck is 6.5 (10=best), which means it is more comfortable than most places in North Dakota.

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

59°F

Today's Weather - Bismarck, ND

68°F

Average Monthly High / Low (°F)

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

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 Bismarck with an average high temperature of 83.6°, which ranks it as warmer than most places in North Dakota. In Bismarck, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Bismarck are June, August and July.

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

January has the coldest nighttime temperatures for Bismarck with an average of 2.2°. This is warmer than most places in North Dakota.

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

In Bismarck, there are 15.2 days annually when the high temperature is over 90°, which is hotter than most places in North Dakota.

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 Bismarck, there are 182.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in North Dakota.

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 Bismarck, there are 35.2 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in North Dakota.

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 Bismarck with 3.2 inches of rain, and the driest month is January with 0.4 inches. The wettest season is Autumn with 47% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 18.5 inches in Bismarck means that it is about average compared to other places in North Dakota.

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 Bismarck with 10.7 days of rain, and February is the driest month with only 5.5 rainy days. There are 87.2 rainy days annually in Bismarck, which is rainier than most places in North Dakota. The rainiest season is Autumn when it rains 32% of the time and the driest is Spring with only a 21% 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 46.2 inches in Bismarck means that it is one of the snowiest places in North Dakota.

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

March is the snowiest month in Bismarck with 8.4 inches of snow, and 7 months of the year have significant snowfall.