S
M
T
W
T
F
S
26
75°
64°
27
79°
63°
28
77°
65°
29
81°
63°
30
76°
59°
31
74°
58°
1
74°
57°
2
76°
62°
3
79°
65°
4
82°
64°
5
76°
64°
6
77°
61°
7
82°
63°
8
83°
64°
9
83°
58°
10
78°
57°
11
75°
56°
12
76°
57°
13
74°
55°
14
75°
54°
15
76°
60°
16
79°
60°
17
73°
56°
18
76°
55°
19
79°
55°
20
82°
56°
21
83°
61°
22
83°
62°
23
80°
60°
24
80°
57°
25
79°
51°
26
73°
52°
27
74°
55°
28
74°
56°
29
71°
58°
30
72°
59°
31
76°
58°
1
75°
55°
2
78°
51°
3
73°
50°
4
76°
52°
5
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in South Dundas
South Dundas's August 2026 forecast shows daily high temperatures ranging from 71° to 83°, with overnight lows between 50° and 65°. The average high for August is 77° with an average low of 58°. 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 South Dundas. See also: September | October | November.