S
M
T
W
T
F
S
30
91°
65°
31
94°
69°
1
94°
70°
2
93°
68°
3
94°
69°
4
94°
71°
5
93°
70°
6
93°
70°
7
92°
69°
8
88°
70°
9
87°
69°
10
91°
69°
11
90°
68°
12
91°
69°
13
92°
68°
14
91°
67°
15
90°
67°
16
84°
62°
17
82°
63°
18
84°
65°
19
85°
62°
20
81°
63°
21
81°
63°
22
80°
64°
23
84°
64°
24
85°
63°
25
86°
64°
26
87°
63°
27
86°
62°
28
85°
61°
29
84°
60°
30
84°
60°
1
82°
59°
2
85°
61°
3
76°
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 76° to 94°, with overnight lows between 54° and 71°. The average high for September is 87° with an average low of 65°. 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.
