S
M
T
W
T
F
S
30
77°
61°
31
78°
56°
1
76°
57°
2
74°
55°
3
73°
54°
4
74°
55°
5
74°
57°
6
75°
59°
7
73°
57°
8
74°
56°
9
73°
53°
10
75°
60°
11
77°
60°
12
77°
61°
13
78°
59°
14
79°
58°
15
75°
51°
16
75°
52°
17
67°
60°
18
75°
59°
19
77°
58°
20
74°
50°
21
77°
48°
22
74°
47°
23
74°
55°
24
73°
57°
25
Hist. Avg.
69°
50°
26
Hist. Avg.
69°
50°
27
Hist. Avg.
68°
50°
28
Hist. Avg.
68°
49°
29
Hist. Avg.
68°
49°
30
Hist. Avg.
67°
49°
1
Hist. Avg.
67°
48°
2
Hist. Avg.
66°
48°
3
Hist. Avg.
66°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Tecumseh
Tecumseh's September 2026 forecast shows daily high temperatures ranging from 67° to 79°, with overnight lows between 47° and 61°. The average high for September is 75° 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.
