S
M
T
W
T
F
S
30
93°
65°
31
87°
67°
1
93°
68°
2
92°
67°
3
89°
66°
4
86°
64°
5
89°
65°
6
88°
66°
7
88°
66°
8
87°
67°
9
88°
66°
10
90°
66°
11
89°
65°
12
90°
65°
13
90°
64°
14
89°
65°
15
90°
65°
16
91°
64°
17
87°
64°
18
86°
63°
19
83°
63°
20
82°
62°
21
85°
60°
22
87°
58°
23
85°
62°
24
87°
58°
25
87°
60°
26
82°
61°
27
84°
61°
28
85°
60°
29
84°
59°
30
80°
55°
1
78°
51°
2
78°
50°
3
76°
49°
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 76° to 93°, with overnight lows between 49° and 68°. The average high for September is 86° with an average low of 62°. 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.
