Ann Arbor, MI Weather by Month and Climate Averages

How much rain does Ann Arbor get?

Ann Arbor gets 37.9 in of precipitation in an average year, spread over about 163 days with measurable rain. That is more rainy days than 97% of the US.

June is the wettest month, with 4.3 in. February is the driest, with 2.4 in. January has the most rainy days, about 18.

The longest dry spell in the last five years lasted 22 days, to June 11, 2023.

See where Ann Arbor ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in Michigan.

Does it snow in Ann Arbor?

Yes. Ann Arbor gets about 59.3 in of snow in an average season, measured at the reporting station.

The snowiest winter on record is 2013–14, with 95.1 in.

The most recent measurable snow at the station fell on April 6, 2026.

See where Ann Arbor ranks: snowiest cities in the US.

Ann Arbor weather by month

Ann Arbor weather in January

In January, Ann Arbor averages a high of 32°F and a low of 17°F. It gets 2.8 in of precipitation over about 18 rainy days. The sun is out about 20% of daylight hours. The January record high is 63°F (2008) and the record low is -18°F (2019).

Ann Arbor weather in February

In February, Ann Arbor averages a high of 34°F and a low of 16°F. It gets 2.4 in of precipitation over about 15 rainy days. The sun is out about 34% of daylight hours. The February record high is 73°F (2024) and the record low is -18°F (2015).

Ann Arbor weather in March

In March, Ann Arbor averages a high of 46°F and a low of 25°F. It gets 2.8 in of precipitation over about 14 rainy days. The sun is out about 33% of daylight hours. The March record high is 87°F (2012) and the record low is -10°F (2014).

Ann Arbor weather in April

In April, Ann Arbor averages a high of 59°F and a low of 35°F. It gets 3.3 in of precipitation over about 14 rainy days. The sun is out about 36% of daylight hours. The April record high is 85°F (2004) and the record low is 14°F (2016).

Ann Arbor weather in May

In May, Ann Arbor averages a high of 70°F and a low of 46°F. It gets 3.8 in of precipitation over about 15 rainy days. The sun is out about 38% of daylight hours. The May record high is 95°F (2006) and the record low is 25°F (2005). May is one of the most comfortable months to visit.

Ann Arbor weather in June

In June, Ann Arbor averages a high of 80°F and a low of 56°F. It gets 4.3 in of precipitation over about 12 rainy days. The sun is out about 47% of daylight hours. The June record high is 99°F (2012) and the record low is 37°F (2003).

Ann Arbor weather in July

In July, Ann Arbor averages a high of 84°F and a low of 60°F. It gets 3.9 in of precipitation over about 11 rainy days. The sun is out about 48% of daylight hours. The July record high is 100°F (2012) and the record low is 43°F (2007).

Ann Arbor weather in August

In August, Ann Arbor averages a high of 82°F and a low of 58°F. It gets 3.3 in of precipitation over about 11 rainy days. The sun is out about 49% of daylight hours. The August record high is 98°F (2012) and the record low is 42°F (2025).

Ann Arbor weather in September

In September, Ann Arbor averages a high of 76°F and a low of 51°F. It gets 3.0 in of precipitation over about 11 rainy days. The sun is out about 50% of daylight hours. The September record high is 95°F (2011) and the record low is 32°F (2020). September is one of the most comfortable months to visit.

Ann Arbor weather in October

In October, Ann Arbor averages a high of 62°F and a low of 40°F. It gets 2.9 in of precipitation over about 14 rainy days. The sun is out about 42% of daylight hours. The October record high is 90°F (2007) and the record low is 22°F (2008). October is one of the most comfortable months to visit.

Ann Arbor weather in November

In November, Ann Arbor averages a high of 49°F and a low of 30°F. It gets 2.7 in of precipitation over about 12 rainy days. The sun is out about 40% of daylight hours. The November record high is 78°F (2015) and the record low is 3°F (2019).

Ann Arbor weather in December

In December, Ann Arbor averages a high of 37°F and a low of 23°F. It gets 2.6 in of precipitation over about 17 rainy days. The sun is out about 19% of daylight hours. The December record high is 63°F (2023) and the record low is -10°F (2017).

Sunshine, humidity and wind in Ann Arbor

September is the sunniest month in Ann Arbor, with sunshine about 50% of daylight hours. December is the cloudiest, at 19%. Over the year the sun shines about 38% of daylight hours. Ann Arbor is cloudier than 92% of the US.

Humidity peaks in January at 76% and is lowest in May at 59%.

Ann Arbor has about 12 days a year above 90°F. Ann Arbor is cooler than 74% of the US.

Thunderstorms occur on about 39 days a year.

See where Ann Arbor ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.

First and last freeze in Ann Arbor

The first fall freeze in Ann Arbor typically comes around October 15, and the last spring freeze around May 6. That leaves a frost-free growing season of about 162 days.

Ann Arbor weather records

The hottest temperature on record at the Ann Arbor station is 100°F, on July 5, 2012. The coldest is -18°F, on February 20, 2015.

The wettest day on record brought 5.3 in of rain, on June 26, 2021.

The best time to visit Ann Arbor

The most comfortable time to visit is typically May and September to October, when daytime highs sit near 70°F.

Winter (December–February) is cold, with average highs around 34°F and lows near 18°F. Snow is possible.

Spring (March–May) is mild, with average highs around 58°F and lows near 35°F.

Summer (June–August) is hot, with average highs around 82°F and lows near 58°F.

Autumn (September–November) is mild, with average highs around 62°F and lows near 40°F.

Ann Arbor climate questions

How much rain does Ann Arbor get?

Ann Arbor gets 37.9 in of precipitation in an average year, over about 163 rainy days.

What is the wettest month in Ann Arbor?

June is the wettest month in Ann Arbor, with 4.3 in. February is the driest, with 2.4 in.

How many rainy days does Ann Arbor have a year?

Ann Arbor has about 163 days with measurable rain in an average year. January has the most, about 18.

Does it snow in Ann Arbor?

Yes. Ann Arbor gets about 59.3 in of snow in an average season. The snowiest winter on record is 2013–14, with 95.1 in.

What is the hottest month in Ann Arbor?

July is the warmest month in Ann Arbor, with an average high of 84°F.

What is the coldest month in Ann Arbor?

February is the coldest month in Ann Arbor, with an average low of 16°F.

What is the record high temperature in Ann Arbor?

The record high at the Ann Arbor station is 100°F, set on July 5, 2012. The record low is -18°F, on February 20, 2015.

What is the sunniest month in Ann Arbor?

September is the sunniest month in Ann Arbor, with sunshine about 50% of daylight hours. December is the cloudiest.

When is the first frost in Ann Arbor?

The first fall freeze in Ann Arbor typically comes around October 15. The last spring freeze is around May 6.

What is the best time to visit Ann Arbor?

The most comfortable time to visit is typically May and September to October, when daytime highs sit near 70°F.