S
M
T
W
T
F
S
26
66°
45°
27
63°
45°
28
55°
39°
29
55°
37°
30
52°
37°
1
54°
36°
2
64°
32°
3
72°
46°
4
64°
43°
5
52°
36°
6
48°
30°
7
59°
27°
8
73°
37°
9
63°
43°
10
61°
34°
11
70°
30°
12
72°
54°
13
72°
45°
14
81°
43°
15
90°
55°
16
81°
52°
17
75°
55°
18
66°
57°
19
55°
45°
20
59°
37°
21
64°
43°
22
64°
48°
23
68°
48°
24
82°
46°
25
88°
63°
26
88°
66°
27
90°
63°
28
84°
64°
29
86°
61°
30
82°
57°
31
79°
60°
1
76°
60°
2
82°
57°
3
85°
64°
4
79°
61°
5
79°
60°
6
77°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dundas
Dundas's May 2026 forecast shows daily high temperatures ranging from 76° to 85°, with overnight lows between 57° and 64°. The average high for May is 80° 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 May weather will actually feel in Dundas. See also: June | July | August.