Ann Arbor
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Ann Arbor Weather in September

September is one of the excellent 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 excellent, 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.

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).

Ann Arbor Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Ann Arbor - and find the best time to visit.

Best Places in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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

Ann Arbor 3-Day Forecast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.