S
M
T
W
T
F
S
30
77°
66°
31
84°
68°
1
85°
69°
2
94°
70°
3
93°
68°
4
79°
67°
5
75°
62°
6
78°
55°
7
78°
55°
8
83°
55°
9
78°
66°
10
81°
57°
11
79°
53°
12
83°
60°
13
79°
53°
14
71°
45°
15
86°
55°
16
74°
64°
17
74°
57°
18
75°
54°
19
69°
59°
20
67°
57°
21
68°
56°
22
71°
54°
23
75°
55°
24
73°
50°
25
71°
51°
26
74°
50°
27
73°
53°
28
74°
52°
29
73°
45°
30
72°
51°
1
75°
51°
2
69°
50°
3
64°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Tecumseh
Tecumseh's September 2026 forecast shows daily high temperatures ranging from 64° to 75°, with overnight lows between 45° and 64°. The average high for September is 72° with an average low of 53°. 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 Tecumseh. See also: October | November | December.
