S
M
T
W
T
F
S
26
82°
63°
27
82°
63°
28
81°
62°
29
81°
61°
30
74°
57°
31
72°
54°
1
73°
54°
2
74°
57°
3
75°
60°
4
80°
61°
5
78°
60°
6
76°
61°
7
77°
60°
8
75°
60°
9
73°
58°
10
75°
52°
11
77°
58°
12
79°
61°
13
81°
60°
14
82°
59°
15
78°
58°
16
78°
59°
17
82°
52°
18
76°
51°
19
71°
50°
20
70°
50°
21
72°
49°
22
72°
49°
23
75°
50°
24
76°
49°
25
77°
50°
26
79°
57°
27
79°
55°
28
74°
50°
29
70°
54°
30
74°
55°
31
75°
50°
1
77°
48°
2
71°
47°
3
70°
49°
4
74°
57°
5
74°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in New Tecumseth
New Tecumseth's August 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 47° and 63°. The average high for August is 76° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in New Tecumseth. See also: September | October | November.