S
M
T
W
T
F
S
30
86°
67°
31
90°
69°
1
76°
57°
2
73°
54°
3
75°
58°
4
77°
56°
5
76°
57°
6
71°
55°
7
75°
62°
8
77°
63°
9
79°
62°
10
73°
61°
11
74°
61°
12
79°
60°
13
73°
59°
14
71°
60°
15
73°
60°
16
77°
61°
17
77°
60°
18
76°
56°
19
68°
53°
20
67°
57°
21
70°
55°
22
69°
57°
23
71°
51°
24
64°
48°
25
64°
48°
26
63°
47°
27
63°
49°
28
64°
52°
29
67°
55°
30
68°
54°
1
70°
48°
2
61°
46°
3
61°
53°
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 61° to 90°, with overnight lows between 46° and 69°. The average high for September is 72° with an average low of 56°. 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.
