Weather for Detroit in September is typically good with an average maximum temperature of +23°C during the day, and approximately 9 sunny days monthly. Typically, there are about 11 rainy days with the total average precipitation that falls in September around 80 mm. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Average weather
☀️
+23°C
Avg. max. temperature
+1°C
Min.
+35°C
Max.
80 mm
Total precipitation
72%
Avg. humidity
3 m/s
Avg. wind
9 ☀️
Sunny Days
7 ⛅️
Cloudy
11 🌦
Rainy
Our opinion: Detroit has good weather in September.
Average temperature in Detroit in September
Here are the expected maximum, average and minimum temperatures in Detroit for September based on the historical data.
Last Year
Historical Data
The expected average maximum temperature in September is +24°C with a maximum of +32°C and a minimum of +10°C.
The average maximum temperature goes down 9% by the end of the month, compared with the beginning of the month, from +26°C to +24°C.
Is Detroit warm or cold in September?
Detroit is typically warm in September.
Maximum temperatures go down compared to the previous month from +27°C to +23°C. The minimum temperature also goes down from +18°C to +14°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Detroit:
Water temperature in Detroit in September
Water in Detroit in September is Fresh. It varies from +18°C to +24°C, with an average of +21°C.This is almost similar to the air temperature, which averages +23°C.
The water temperature in September is one of the warmest of the entire year:
The warmest water temperatures in Detroit are reached in August, when the average sea temperature rises to +23°C. The coldest water temperatures are in February, with an average of +1°C.
Can you swim in Detroit in September?
Water temperature (+21°C) in Detroit in September might be suited for short swims and acclimatized swimmers might find it refreshing.
🦭
Cold
Below +16°C
🏄♂️
Fresh
16°C - 21°C
🏊
Comfortable
21°C - 25°C
👙
Warm
25°C - 28°C
🔥
Very warm
+28°C and up
Think of bringing a full-body or shorty wetsuit (3mm-5mm thickness) to provide insulation and maintain body heat.
Climate in Detroit in September
Detroit weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+27°C
+23°C
+16°C
Min. temperature
+6°C
+1°C
-4°C
Max. temperature
+37°C
+35°C
+31°C
Rainfall
114 mm
80 mm
78 mm
Wind
3 m/s
3 m/s
3 m/s
Avg. water temperature
+23°C
+21°C
+15°C
Humidity
71%
72%
71%
Air pressure
1015 HPa
1016 HPa
1016 HPa
Sunny days
8
9
7
Cloudy days
7
7
10
Rainy days
12
11
14
Snowy days
0
0
0
September weather is still as good as in August.It’s getting colder in September. From +27°C in the day, the average maximum temperature lowers to +23°C.As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 114 mm to 80 mm.Humidity rises from 71% to 72%.The average wind speed doesn’t change much during September, staying around 3 m/s.The good news is there are likely to be more sunny days in September, from 8 to 9.
October brings much the same weather, it remains good.
Wind speed in Detroit in September based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Detroit is gradually increasing during September, going from 2 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Detroit based on historical data.
Last Year
Historical Data
Total precipitation in September is about 63 mm, with a 27% chance of rain on a typical day. The maximum amount of rainfall per day is around 32 mm, which is moderate rain.On average, there are about 8 rainy days during September, so prepare to bring an umbrella.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Detroit wettest month is August, where a typical day has a 39% chance of precipitation and 114 mm of rainfall per day. January, on the other hand, is the driest month with a mere 10% chance of precipitation and 26 mm of rainfall per day.
How was the weather last September in Detroit?
This is the weather in Detroit in September 2023:
1 September
☀️
+26°C
2 September
☀️
+28°C
3 September
☀️
+32°C
4 September
☀️
+32°C
5 September
☀️
+32°C
6 September
☀️
+29°C
7 September
☀️
+26°C
8 September
☁️
+21°C
9 September
☁️
+21°C
10 September
☁️
+23°C
11 September
☀️
+24°C
12 September
🌧️
+23°C
13 September
☀️
+20°C
14 September
☀️
+21°C
15 September
☀️
+22°C
16 September
☀️
+23°C
17 September
☁️
+23°C
18 September
☁️
+20°C
19 September
☀️
+22°C
20 September
☁️
+26°C
21 September
☀️
+28°C
22 September
☀️
+26°C
23 September
☀️
+23°C
24 September
☀️
+25°C
25 September
☁️
+21°C
26 September
🌧️
+21°C
27 September
☁️
+19°C
28 September
☁️
+18°C
29 September
☁️
+21°C
30 September
☀️
+24°C
In September 2023 Detroit had 18 sunny days, 10 cloudy days, and 2 rainy days. The average maximum temperature was +24°C, with an absolute maximum of +32°C and a minimum of +18°C. The average humidity was 80%, with a maximum of 100% and a minimum of 49%. The average wind speed was 3 m/s, with a maximum of 9 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change over Years
This is how Detroit climate have been changing during last 43 years period.
The climate in Detroit in September has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+13°C) and the highest in 1998 (+17°C). The driest year was 1999 with only 460 mm of rainfall, and the wettest year was 2023 with 1977 mm.
FAQ
Frequently asked questions about the weather in Detroit in September:
Is September a good time to visit Detroit?
September is a really good time to go to Detroit. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Detroit.
Can you sunbathe in Detroit in September?
September is warm in Detroit. You may enjoy some beach or pool time in the day, but pack something a tad warmer for the evening.
Can you swim in Detroit in September?
In general, you can swim in Detroit in September, if you want to, at an average water temperature of +21°C. But it will feel quite cool, and some precautions are necessary to ensure your comfort and safety.
Is Detroit rainy in September?
Detroit is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Detroit in September?
Usually, it’s not very sunny in Detroit in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Detroit, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.