2025 Compare Climate & Weather:
Ann Arbor, MI vs Detroit, MI

Highlights

On average, there are 183 sunny days per year in Detroit. Ann Arbor averages 178 sunny days per year. The US average is 205 sunny days.

Detroit, Michigan gets 33.5 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.

Detroit averages 33 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

Detroit, Michigan
Summer High: the July high is around 83.5 degrees
Winter Low: the January low is 18.5
Rain: averages 33.5 inches of rain a year
Snow: averages 33 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 Detroit is 6.9 (10=best), which means it is one of the most pleasant places in Michigan.

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

54°F

Today's Weather - Detroit, MI

57°F

Average Monthly High / Low (°F)

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

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 Detroit with an average high temperature of 83.5°, which ranks it as one of the hottest places in Michigan. In Detroit, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Detroit 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 Detroit with an average of 18.5°. This is one of the warmest places in Michigan.

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 Detroit, there are 9.5 days annually when the high temperature is over 90°, which is one of the hottest places in Michigan.

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 Detroit, there are 126.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Michigan.

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 Detroit, there are 2.3 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Michigan.

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 Detroit with 3.5 inches of rain, and the driest month is January with 1.8 inches. The wettest season is Autumn with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 33.5 inches in Detroit means that it is about average compared to other places in Michigan.

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.

December is the rainiest month in Detroit with 12.1 days of rain, and February is the driest month with only 9.0 rainy days. There are 125.2 rainy days annually in Detroit, which is less rainy than most places in Michigan. The rainiest season is Summer when it rains 26% of the time and the driest is Autumn with only a 24% 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 33.0 inches in Detroit means that it is one of the least snowy places in Michigan.

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

January is the snowiest month in Detroit with 10.2 inches of snow, and 6 months of the year have significant snowfall.