S
M
T
W
T
F
S
26
57°
38°
27
56°
34°
28
65°
45°
29
53°
39°
30
57°
35°
1
54°
32°
2
47°
33°
3
62°
33°
4
75°
50°
5
66°
48°
6
51°
36°
7
54°
36°
8
60°
38°
9
67°
43°
10
58°
38°
11
59°
36°
12
53°
31°
13
63°
44°
14
54°
44°
15
69°
43°
16
70°
49°
17
85°
57°
18
89°
53°
19
87°
67°
20
66°
43°
21
57°
45°
22
57°
47°
23
53°
50°
24
67°
55°
25
71°
51°
26
75°
56°
27
73°
56°
28
72°
55°
29
74°
56°
30
72°
57°
31
73°
58°
1
71°
56°
2
72°
50°
3
76°
56°
4
75°
57°
5
76°
55°
6
74°
54°
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 53° to 76°, with overnight lows between 43° and 58°. The average high for May is 70° with an average low of 53°. 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.