Ann Arbor, MI Climate & Monthly Averages
The climate of Ann Arbor
Located in Michigan, United States, Ann Arbor experiences a humid continental climate with warm summers and cold, often snowy winters. Afternoon temperatures peak near 82°F (28°C) in July and dip to about 32°F (0°C) in January, with around 36.7 inches (932 mm) of precipitation falling across the year.
Climate quick facts
- Hottest month: July - highs near 82°F (28°C)
- Coldest month: January - highs near 32°F (0°C)
- Record high: 94°F (34°C) · Record low: -25°F (-32°C) (2015–2024)
- Wettest month: July (12 rainy days) · Sunniest: July (12.2 h sun/day)
- Climate type: humid continental - warm summers and cold, often snowy winters
- Snow: about 19 days a year
Temperatures through the year
The warmest stretch of the year centers on July. Highs average 82°F (28°C) and overnight lows stay near 64°F (18°C). The coolest month is January, with typical highs of 32°F (0°C) and lows around 19°F (-7°C). Based on 2015–2024 weather data, temperatures have reached as high as 94°F (34°C) and dropped as low as -25°F (-32°C).
Rain, sun and snow
July is usually the wettest month. It brings about 3.6 inches (91 mm) of rain over 12 days, while November is the driest. July brings the most sunshine, averaging 12.2 hours of sun a day. Snow falls on about 19 days in a typical year, mostly from November through April.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 32° | 19° | 10 | 2.5 in | 4.4 h/day | 75% |
| February | 36° | 19° | 9 | 2.5 in | 6.5 h/day | 73% |
| March | 46° | 28° | 10 | 3.2 in | 7.5 h/day | 67% |
| April | 56° | 37° | 13 | 3.4 in | 8.6 h/day | 67% |
| May | 69° | 50° | 12 | 3.6 in | 10.1 h/day | 68% |
| June | 78° | 59° | 12 | 3.5 in | 12.0 h/day | 66% |
| July | 82° | 64° | 12 | 3.6 in | 12.2 h/day | 70% |
| August | 80° | 63° | 11 | 3.5 in | 11.2 h/day | 72% |
| September | 74° | 58° | 9 | 2.9 in | 9.4 h/day | 74% |
| October | 61° | 46° | 11 | 3.4 in | 7.1 h/day | 73% |
| November | 47° | 34° | 9 | 2.3 in | 5.8 h/day | 73% |
| December | 39° | 27° | 10 | 2.5 in | 4.1 h/day | 77% |
Ann Arbor month by month
Ann Arbor weather in January
January brings highs around 32°F (0°C), lows near 19°F (-7°C), about 10 wet days and roughly 5 snowy days - typically the coldest month of the year in Ann Arbor.
Ann Arbor weather in February
February brings highs around 36°F (2°C), lows near 19°F (-7°C), about 9 wet days and roughly 4 snowy days.
Ann Arbor weather in March
March brings highs around 46°F (8°C), lows near 28°F (-2°C), about 10 wet days and roughly 3 snowy days.
Ann Arbor weather in April
April brings highs around 56°F (14°C), lows near 37°F (3°C), about 13 wet days and roughly 2 snowy days.
Ann Arbor weather in May
May brings highs around 69°F (21°C), lows near 50°F (10°C), about 12 wet days.
Ann Arbor weather in June
June brings highs around 78°F (26°C), lows near 59°F (15°C), about 12 wet days.
Ann Arbor weather in July
July brings highs around 82°F (28°C), lows near 64°F (18°C), about 12 wet days - typically the hottest month and the wettest month and the sunniest month of the year in Ann Arbor.
Ann Arbor weather in August
August brings highs around 80°F (27°C), lows near 63°F (17°C), about 11 wet days.
Ann Arbor weather in September
September brings highs around 74°F (24°C), lows near 58°F (14°C), about 9 wet days.
Ann Arbor weather in October
October brings highs around 61°F (16°C), lows near 46°F (8°C), about 11 wet days.
Ann Arbor weather in November
November brings highs around 47°F (9°C), lows near 34°F (1°C), about 9 wet days and roughly 2 snowy days - typically the driest month of the year in Ann Arbor.
Ann Arbor weather in December
December brings highs around 39°F (4°C), lows near 27°F (-3°C), about 10 wet days and roughly 3 snowy days.
Seasons in Ann Arbor
Spring (March through May)
Spring in Ann Arbor is crisp but comfortable, with daytime highs averaging 57°F (14°C) and nights around 38°F (4°C); expect showers on roughly 36 days across the season, plus around 5 snowy days.
Summer (June through August)
Summer in Ann Arbor brings comfortable warmth, with daytime highs averaging 80°F (27°C) and nights around 62°F (17°C); expect showers on roughly 34 days across the season.
Fall (September through November)
Fall in Ann Arbor is mild, with daytime highs averaging 61°F (16°C) and nights around 46°F (8°C); expect showers on roughly 30 days across the season, plus around 2 snowy days.
Winter (December through February)
Winter in Ann Arbor is bitterly cold, with daytime highs averaging 36°F (2°C) and nights around 22°F (-6°C); expect showers on roughly 30 days across the season, plus around 12 snowy days. Wind makes those temperatures feel harsher than they sound - pair the forecast winds with the wind speed converter to judge conditions on exposed skin.
Climate questions, answered
What is the average temperature in Ann Arbor?
Is Ann Arbor hot in summer?
Is Ann Arbor cold in winter?
How many rainy days does Ann Arbor get in a year?
Best time to visit Ann Arbor
The best time to visit Ann Arbor is generally June to October, when this window offers the warmest, brightest days of the year. Daytime temperatures in that window typically sit near 75°F (24°C).
Pack for Ann Arbor with a heavy insulated coat, hat and gloves for winter; a compact umbrella or rain shell - showers are a regular feature. Evenings can feel noticeably cooler than afternoons - July nights average 64°F (18°C).
Ann Arbor temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.