S
M
T
W
T
F
S
30
75°
68°
31
84°
71°
1
92°
74°
2
95°
72°
3
86°
67°
4
81°
63°
5
79°
62°
6
79°
62°
7
80°
62°
8
75°
60°
9
76°
63°
10
77°
60°
11
76°
57°
12
75°
57°
13
73°
58°
14
74°
56°
15
77°
62°
16
78°
61°
17
77°
61°
18
72°
60°
19
77°
61°
20
78°
62°
21
78°
62°
22
77°
61°
23
78°
61°
24
77°
60°
25
76°
59°
26
75°
58°
27
76°
59°
28
76°
58°
29
75°
57°
30
72°
56°
1
72°
56°
2
73°
57°
3
74°
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 72° to 95°, with overnight lows between 56° and 74°. The average high for September is 77° with an average low of 61°. 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.
