S
M
T
W
T
F
S
26
83°
67°
27
83°
68°
28
82°
66°
29
82°
65°
30
76°
62°
31
74°
58°
1
75°
59°
2
75°
63°
3
77°
65°
4
80°
65°
5
79°
64°
6
76°
65°
7
79°
65°
8
77°
64°
9
75°
62°
10
75°
57°
11
78°
62°
12
81°
64°
13
82°
65°
14
83°
64°
15
81°
63°
16
79°
64°
17
83°
57°
18
78°
56°
19
73°
55°
20
72°
55°
21
73°
54°
22
73°
55°
23
75°
55°
24
77°
56°
25
78°
56°
26
79°
62°
27
80°
59°
28
76°
55°
29
71°
58°
30
73°
57°
31
75°
55°
1
78°
52°
2
71°
53°
3
70°
55°
4
75°
62°
5
73°
60°
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 52° and 68°. The average high for August is 77° with an average low of 60°. 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.
