S
M
T
W
T
F
S
26
78°
66°
27
83°
66°
28
81°
65°
29
82°
66°
30
79°
63°
31
75°
61°
1
76°
65°
2
80°
67°
3
82°
67°
4
83°
66°
5
82°
65°
6
82°
66°
7
80°
65°
8
82°
64°
9
82°
58°
10
75°
56°
11
74°
58°
12
75°
59°
13
75°
56°
14
76°
58°
15
75°
63°
16
75°
63°
17
80°
62°
18
76°
57°
19
76°
61°
20
78°
63°
21
79°
64°
22
79°
63°
23
78°
63°
24
79°
60°
25
77°
56°
26
73°
57°
27
73°
62°
28
77°
60°
29
76°
61°
30
77°
62°
31
75°
55°
1
73°
56°
2
72°
53°
3
70°
53°
4
71°
54°
5
73°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dunnville
Dunnville's August 2026 forecast shows daily high temperatures ranging from 70° to 83°, with overnight lows between 53° and 67°. The average high for August is 77° with an average low of 61°. 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 Dunnville. See also: September | October | November.
