S
M
T
W
T
F
S
26
83°
59°
27
87°
61°
28
83°
61°
29
82°
59°
30
N/A
31
87°
69°
1
80°
65°
2
74°
62°
3
75°
60°
4
79°
62°
5
79°
65°
6
81°
60°
7
79°
61°
8
80°
61°
9
81°
62°
10
78°
62°
11
79°
61°
12
77°
58°
13
82°
62°
14
82°
57°
15
74°
55°
16
74°
57°
17
74°
61°
18
75°
61°
19
74°
59°
20
74°
58°
21
75°
55°
22
73°
54°
23
72°
53°
24
72°
55°
25
73°
54°
26
71°
55°
27
72°
56°
28
72°
53°
29
71°
54°
30
73°
57°
31
77°
61°
1
73°
60°
2
75°
57°
3
71°
54°
4
70°
56°
5
70°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dundas
Dundas's August 2026 forecast shows daily high temperatures ranging from 70° to 87°, with overnight lows between 53° and 69°. The average high for August is 76° with an average low of 59°. 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 Dundas. See also: September | October | November.