S
M
T
W
T
F
S
30
89°
59°
31
82°
60°
1
87°
55°
2
79°
54°
3
79°
59°
4
87°
62°
5
87°
61°
6
88°
58°
7
87°
59°
8
82°
60°
9
82°
54°
10
81°
51°
11
77°
53°
12
79°
55°
13
77°
58°
14
81°
58°
15
82°
57°
16
83°
54°
17
79°
47°
18
75°
45°
19
72°
46°
20
72°
47°
21
74°
53°
22
79°
56°
23
81°
56°
24
80°
51°
25
81°
44°
26
76°
45°
27
69°
43°
28
68°
42°
29
69°
43°
30
70°
42°
1
Hist. Avg.
72°
47°
2
Hist. Avg.
72°
46°
3
Hist. Avg.
71°
46°
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 68° to 89°, with overnight lows between 42° and 62°. The average high for September is 79° 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.
