S
M
T
W
T
F
S
30
94°
73°
31
93°
73°
1
98°
70°
2
98°
72°
3
96°
74°
4
97°
73°
5
97°
71°
6
94°
70°
7
90°
68°
8
101°
72°
9
84°
71°
10
85°
64°
11
88°
60°
12
76°
59°
13
65°
59°
14
91°
56°
15
74°
60°
16
75°
58°
17
75°
69°
18
94°
72°
19
86°
67°
20
67°
61°
21
70°
57°
22
67°
56°
23
74°
57°
24
67°
58°
25
62°
58°
26
74°
61°
27
80°
62°
28
75°
60°
29
78°
62°
30
71°
67°
1
67°
53°
2
67°
46°
3
71°
52°
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 67° to 71°, with overnight lows between 46° and 52°. The average high for September is 69° with an average low of 49°. 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.
