2025 Compare Climate & Weather:
Iron River, MI vs Duluth, MN

Highlights

On average, there are 178 sunny days per year in Duluth. Iron River averages 184 sunny days per year. The US average is 205 sunny days.

Duluth, Minnesota gets 31.2 inches of rain, on average, per year. Iron River, Michigan gets 30.5 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. Iron River averages 79.7 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

Iron River, Michigan
Summer High: the July high is around 77.9 degrees
Winter Low: the January low is 0.4
Rain: averages 30.5 inches of rain a year
Snow: averages 79.7 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 Iron River is 5.9 (10=best), which means it is one of the least comfortable places in Michigan.

Today's Weather - Iron River, MI

38°F

Today's Weather - Duluth, MN

40°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Iron River / Duluth

July is the hottest month for Iron River with an average high temperature of 77.9°, which ranks it as cooler than most places in Michigan. In Iron River, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Iron River are July, August and June.

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.

January has the coldest nighttime temperatures for Iron River with an average of 0.4°. This is one of the coldest places in Michigan.

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 Iron River, there are 1.8 days annually when the high temperature is over 90°, which is one of the coolest places in Michigan.

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 Iron River, there are 201.5 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Michigan.

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 Iron River, there are 44.1 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in Michigan.

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.

July is the wettest month in Iron River with 4.2 inches of rain, and the driest month is February with 0.9 inches. The wettest season is Autumn with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 30.5 inches in Iron River means that it is one of the driest places in Michigan.


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.

October is the rainiest month in Iron River with 13.0 days of rain, and February is the driest month with only 7.4 rainy days. There are 127.4 rainy days annually in Iron River, which is about average compared to other places in Michigan. The rainiest season is Winter when it rains 28% of the time and the driest is Spring with only a 22% 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 79.7 inches in Iron River means that it is snowier than most places in Michigan.

An annual snowfall of 69.5 inches in Duluth means that it is one of the snowiest places in Minnesota.

January is the snowiest month in Iron River with 16.8 inches of snow, and 8 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.