S
M
T
W
T
F
S
30
83°
65°
31
88°
64°
1
88°
64°
2
89°
63°
3
89°
60°
4
87°
62°
5
82°
63°
6
87°
62°
7
84°
57°
8
78°
54°
9
79°
61°
10
78°
62°
11
85°
61°
12
85°
61°
13
86°
60°
14
86°
58°
15
84°
58°
16
76°
56°
17
77°
50°
18
76°
52°
19
76°
48°
20
74°
48°
21
73°
49°
22
74°
56°
23
77°
55°
24
81°
56°
25
81°
57°
26
80°
55°
27
81°
56°
28
79°
52°
29
78°
51°
30
77°
50°
1
76°
50°
2
78°
53°
3
79°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Detroit
Detroit's September 2026 forecast shows daily high temperatures ranging from 73° to 89°, with overnight lows between 48° and 65°. The average high for September is 81° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Detroit. See also: October | November | December.
