S
M
T
W
T
F
S
30
81°
63°
31
76°
56°
1
75°
55°
2
73°
52°
3
75°
52°
4
76°
53°
5
77°
54°
6
73°
50°
7
77°
58°
8
79°
57°
9
80°
57°
10
75°
55°
11
78°
57°
12
80°
56°
13
74°
53°
14
72°
54°
15
76°
56°
16
79°
56°
17
79°
55°
18
78°
50°
19
68°
47°
20
69°
53°
21
73°
49°
22
71°
52°
23
73°
46°
24
66°
42°
25
65°
42°
26
65°
43°
27
66°
43°
28
65°
46°
29
70°
50°
30
72°
50°
1
73°
43°
2
62°
40°
3
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Ann Arbor
Ann Arbor's September 2026 forecast shows daily high temperatures ranging from 62° to 81°, with overnight lows between 40° and 63°. The average high for September is 73° with an average low of 51°. 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 Ann Arbor. See also: October | November | December.
