Mild
Average highs are around 23°C, so days are mild rather than hot.
September verdict
Ann Arbor, Michigan, United States in September
Weather score55Good
Good for holiday weather
Average highs are around 23°C, so days are mild rather than hot. Sunshine averages 7.1h per day, enough for a balanced month. Rainfall averages 66mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
23°C
Rain
66mm
Sun
7.1h
Sea
20°C
Weather score
55
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 66mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 7.1h per day, enough for a balanced month.
Cool sea
Sea temperatures average 20°C, so the water can feel cool.
Map
Weather map
Compare Ann Arbor, Michigan, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September23°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
September66mm average rain
September sits near Ann Arbor's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to March, May, and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September7.1 hours average sun
September sits close to Ann Arbor's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September20°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJune to September
Sea temperatures are usually near 18°C in this stretch, so swimming comfort is at its strongest.
Weather score
September55 weather score
September sits close to Ann Arbor's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
Hotels in Ann Arbor, Michigan, United States
Marriott
Sheraton Ann Arbor HotelAnn Arbor, Michigan, USA
The Vanguard Ann Arbor, Autograph CollectionAnn Arbor, Michigan, USA
AC Hotel Ann Arbor DowntownAnn Arbor, Michigan, USA
Courtyard Ann ArborAnn Arbor, Michigan, USA
Fairfield Inn Ann ArborAnn Arbor, Michigan, USA
Residence Inn Ann Arbor DowntownAnn Arbor, Michigan, USA