S
M
T
W
T
F
S
30
75°
68°
31
84°
71°
1
94°
74°
2
98°
71°
3
84°
68°
4
78°
68°
5
80°
63°
6
78°
60°
7
78°
59°
8
82°
61°
9
77°
70°
10
82°
61°
11
76°
58°
12
82°
63°
13
82°
51°
14
72°
58°
15
80°
67°
16
74°
65°
17
75°
60°
18
74°
61°
19
74°
60°
20
70°
58°
21
71°
56°
22
69°
56°
23
70°
54°
24
73°
57°
25
73°
57°
26
74°
52°
27
75°
57°
28
74°
58°
29
73°
57°
30
68°
57°
1
72°
56°
2
73°
55°
3
69°
56°
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 68° to 82°, with overnight lows between 51° and 67°. The average high for September is 73° with an average low of 58°. 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.
