S
M
T
W
T
F
S
26
82°
54°
27
68°
59°
28
68°
57°
29
65°
49°
30
63°
42°
1
59°
46°
2
58°
41°
3
68°
38°
4
76°
55°
5
69°
46°
6
61°
46°
7
65°
40°
8
73°
49°
9
76°
54°
10
71°
55°
11
73°
47°
12
80°
47°
13
72°
54°
14
70°
44°
15
79°
52°
16
81°
64°
17
85°
66°
18
81°
66°
19
86°
67°
20
67°
58°
21
67°
56°
22
67°
60°
23
74°
65°
24
80°
63°
25
80°
65°
26
79°
67°
27
79°
66°
28
83°
64°
29
80°
61°
30
75°
61°
31
77°
59°
1
78°
61°
2
76°
59°
3
78°
59°
4
81°
62°
5
80°
60°
6
79°
64°
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 74° to 83°, with overnight lows between 59° and 67°. The average high for May is 79° with an average low of 62°. 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.