S
M
T
W
T
F
S
30
74°
63°
31
N/A
1
82°
66°
2
80°
64°
3
75°
56°
4
77°
52°
5
75°
54°
6
76°
55°
7
73°
51°
8
68°
53°
9
75°
57°
10
74°
52°
11
71°
40°
12
74°
54°
13
75°
56°
14
70°
53°
15
70°
55°
16
74°
54°
17
73°
51°
18
66°
49°
19
70°
53°
20
73°
55°
21
73°
55°
22
74°
54°
23
74°
53°
24
72°
52°
25
72°
51°
26
71°
52°
27
72°
53°
28
72°
51°
29
69°
49°
30
64°
48°
1
65°
50°
2
68°
51°
3
69°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Tecumseth
New Tecumseth's September 2026 forecast shows daily high temperatures ranging from 64° to 82°, with overnight lows between 40° and 66°. The average high for September is 72° 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 New Tecumseth. See also: October | November | December.
