Ann Arbor Weather in September

September is one of the perfect months to visit Ann Arbor, with daytime temperatures of 24°C (75°F) and lows of 11°C (52°F) at night. Do note that quite a bit of rainfall is typical, averaging around 74 mm (2.9 in).

Rainfall in Ann Arbor in September

Historically, approximately 11 days this month are expected to have rain, averaging 74 mm (2.9 in). Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Ann Arbor in September

September is a good time to be in Ann Arbor. Days are perfect, reaching 24°C (75°F), with nights around 11°C (52°F). This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Ann Arbor in September

Enjoy a sunny month with about 232 hours of sunshine, the clear skies make Ann Arbor even more beautiful.

If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Ann Arbor.

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• January
• February
• March
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• May
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• October
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For a detailed overview over the year and the best time to visit the United States of America, check out our Ann Arbor's climate page.

Ann Arbor Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 24°C (75°F)  

Chance of Rain 36%  

Precipitation 74 mm (2.9 in)  

Rainy days 11 days  

Humidity 72% *  

Sunshine 232 hours *  

Percentage Sunshine 61% *  

* Data from: Detroit, the United States of America (56 KM, 34 Miles).

What to Wear in Ann Arbor in September

For Ann Arbor in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Ann Arbor in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Ann Arbor's climate page.

More climate data for Ann Arbor

Temperature Rainfall Sunshine Humidity

See the full Ann Arbor climate overview or explore weather in the United States of America.