2025 Compare Climate & Weather:
Boulder, CO vs Duluth, MN

Highlights

On average, there are 178 sunny days per year in Duluth. Boulder averages 245 sunny days per year. The US average is 205 sunny days.

Duluth, Minnesota gets 31.2 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.

Duluth averages 69.5 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

Duluth, Minnesota
Summer High: the July high is around 76.5 degrees
Winter Low: the January low is 2.3
Rain: averages 31.2 inches of rain a year
Snow: averages 69.5 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 Duluth is 6.0 (10=best), which means it is one of the least comfortable places in Minnesota.

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

55°F

Today's Weather - Duluth, MN

52°F

Average Monthly High / Low (°F)

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

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.

July is the hottest month for Duluth with an average high temperature of 76.5°, which ranks it as one of the coolest places in Minnesota. In Duluth, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Duluth 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.

January has the coldest nighttime temperatures for Duluth with an average of 2.3°. This is about average compared to other places in Minnesota.

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 Duluth, there are 2.4 days annually when the high temperature is over 90°, which is one of the coolest places in Minnesota.

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 Duluth, there are 174.7 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Minnesota.

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 Duluth, there are 36.1 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Minnesota.

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.


September is the wettest month in Duluth with 4.1 inches of rain, and the driest month is February with 0.8 inches. The wettest season is Autumn with 38% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 31.2 inches in Duluth means that it is wetter than most places in Minnesota.

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.

June is the rainiest month in Duluth with 12.1 days of rain, and February is the driest month with only 6.8 rainy days. There are 117.3 rainy days annually in Duluth, which is one of the rainiest places in Minnesota. The rainiest season is Autumn when it rains 28% of the time and the driest is Spring with only a 21% 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 69.5 inches in Duluth means that it is one of the snowiest places in Minnesota.

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

January is the snowiest month in Duluth with 16.0 inches of snow, and 7 months of the year have significant snowfall.