S
M
T
W
T
F
S
30
95°
71°
31
95°
72°
1
94°
71°
2
95°
71°
3
95°
72°
4
94°
73°
5
94°
72°
6
95°
69°
7
94°
63°
8
86°
63°
9
86°
65°
10
91°
67°
11
92°
68°
12
93°
67°
13
85°
68°
14
90°
69°
15
91°
61°
16
91°
60°
17
82°
59°
18
80°
60°
19
80°
58°
20
81°
57°
21
80°
58°
22
80°
57°
23
81°
57°
24
80°
60°
25
80°
64°
26
80°
64°
27
84°
65°
28
84°
65°
29
83°
59°
30
83°
59°
1
79°
58°
2
78°
54°
3
77°
55°
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 77° to 95°, with overnight lows between 54° and 73°. The average high for September is 87° with an average low of 64°. 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.
