S
M
T
W
T
F
S
30
94°
73°
31
93°
73°
1
98°
70°
2
98°
72°
3
N/A
4
98°
73°
5
97°
70°
6
97°
73°
7
98°
77°
8
98°
71°
9
96°
65°
10
90°
64°
11
88°
67°
12
86°
63°
13
85°
58°
14
84°
59°
15
85°
57°
16
79°
52°
17
86°
60°
18
77°
52°
19
80°
56°
20
83°
58°
21
75°
56°
22
81°
56°
23
81°
55°
24
82°
56°
25
81°
53°
26
69°
44°
27
68°
44°
28
67°
41°
29
68°
47°
30
73°
44°
1
72°
50°
2
69°
47°
3
65°
44°
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 65° to 98°, with overnight lows between 41° and 77°. The average high for September is 82° with an average low of 57°. 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.
