2025 Compare Climate & Weather:
Ann Arbor, MI vs Dubuque, IA

Highlights

On average, there are 194 sunny days per year in Dubuque. Ann Arbor averages 178 sunny days per year. The US average is 205 sunny days.

Dubuque, Iowa gets 36.4 inches of rain, on average, per year. Ann Arbor, Michigan gets 36 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Dubuque averages 37.4 inches of snow per year. Ann Arbor averages 43 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Dubuque, Iowa
Summer High: the July high is around 83.4 degrees
Winter Low: the January low is 10.6
Rain: averages 36.4 inches of rain a year
Snow: averages 37.4 inches of snow a year

Ann Arbor, Michigan
Summer High: the July high is around 82.8 degrees
Winter Low: the January low is 16.5
Rain: averages 36 inches of rain a year
Snow: averages 43 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Dubuque is 6.7 (10=best), which means it is less comfortable than most places in Iowa.

The annual BestPlaces Comfort Index for Ann Arbor is 6.7 (10=best), which means it is more comfortable than most places in Michigan.

Today's Weather - Ann Arbor, MI

43°F

Today's Weather - Dubuque, IA

41°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Ann Arbor / Dubuque

July is the hottest month for Ann Arbor with an average high temperature of 82.8°, which ranks it as warmer than most places in Michigan. In Ann Arbor, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ann Arbor are June, August and September.

July is the hottest month for Dubuque with an average high temperature of 83.4°, which ranks it as cooler than most places in Iowa. In Dubuque, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Dubuque are June, August and September.

January has the coldest nighttime temperatures for Ann Arbor with an average of 16.5°. This is warmer than most places in Michigan.

January has the coldest nighttime temperatures for Dubuque with an average of 10.6°. This is warmer than most places in Iowa.

In Ann Arbor, there are 5.8 days annually when the high temperature is over 90°, which is about average compared to other places in Michigan.

In Dubuque, there are 10.8 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Ann Arbor, there are 140.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Michigan.

In Dubuque, there are 140.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In Ann Arbor, there are 3.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Michigan.

In Dubuque, there are 16.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Iowa.

June is the wettest month in Ann Arbor with 3.7 inches of rain, and the driest month is February with 2.2 inches. The wettest season is Autumn with 30% of yearly precipitation and 20% occurs in Spring, which is the driest season. The annual rainfall of 36.0 inches in Ann Arbor means that it is wetter than most places in Michigan.


June is the wettest month in Dubuque with 4.8 inches of rain, and the driest month is January with 1.2 inches. The wettest season is Autumn with 37% of yearly precipitation and 12% occurs in Spring, which is the driest season. The annual rainfall of 36.4 inches in Dubuque means that it is wetter than most places in Iowa.

December is the rainiest month in Ann Arbor with 13.9 days of rain, and September is the driest month with only 9.6 rainy days. There are 136.9 rainy days annually in Ann Arbor, which is rainier than most places in Michigan. The rainiest season is Spring when it rains 28% of the time and the driest is Autumn with only a 23% chance of a rainy day.

May is the rainiest month in Dubuque with 12.7 days of rain, and February is the driest month with only 7.6 rainy days. There are 116.1 rainy days annually in Dubuque, which is one of the rainiest places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 43.0 inches in Ann Arbor means that it is less snowy than most places in Michigan.

An annual snowfall of 37.4 inches in Dubuque means that it is one of the snowiest places in Iowa.

January is the snowiest month in Ann Arbor with 12.4 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Dubuque with 10.8 inches of snow, and 6 months of the year have significant snowfall.