S
M
T
W
T
F
S
26
77°
54°
27
82°
52°
28
77°
61°
29
72°
57°
30
64°
45°
1
68°
39°
2
61°
39°
3
64°
34°
4
81°
46°
5
73°
59°
6
64°
54°
7
66°
43°
8
72°
37°
9
73°
54°
10
81°
48°
11
72°
50°
12
77°
43°
13
79°
54°
14
66°
46°
15
77°
39°
16
86°
61°
17
88°
59°
18
90°
70°
19
86°
68°
20
86°
68°
21
72°
61°
22
75°
59°
23
79°
68°
24
75°
68°
25
81°
66°
26
82°
68°
27
86°
68°
28
86°
64°
29
86°
61°
30
80°
55°
31
84°
63°
1
80°
58°
2
81°
54°
3
79°
56°
4
84°
59°
5
87°
62°
6
87°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dunnville
Dunnville's May 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 54° and 64°. The average high for May is 83° 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 May weather will actually feel in Dunnville. See also: June | July | August.
