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
83°
67°
16
75°
64°
17
75°
57°
18
75°
54°
19
71°
62°
20
72°
57°
21
70°
50°
22
71°
51°
23
73°
50°
24
73°
50°
25
72°
51°
26
72°
50°
27
73°
49°
28
74°
45°
29
75°
52°
30
72°
51°
1
75°
51°
2
75°
49°
3
73°
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 70° to 83°, with overnight lows between 45° and 67°. The average high for September is 74° 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.
