S
M
T
W
T
F
S
26
58°
37°
27
65°
40°
28
62°
50°
29
50°
40°
30
54°
39°
1
50°
32°
2
47°
31°
3
58°
32°
4
73°
49°
5
63°
47°
6
49°
39°
7
54°
39°
8
55°
37°
9
62°
42°
10
58°
41°
11
55°
38°
12
55°
36°
13
61°
42°
14
53°
44°
15
66°
48°
16
73°
54°
17
75°
51°
18
70°
59°
19
75°
53°
20
63°
43°
21
57°
44°
22
62°
46°
23
65°
50°
24
67°
54°
25
69°
56°
26
70°
56°
27
71°
46°
28
64°
51°
29
67°
52°
30
73°
48°
31
64°
43°
1
63°
44°
2
63°
44°
3
65°
45°
4
66°
48°
5
70°
54°
6
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Halton Hills
Halton Hills's May 2026 forecast shows daily high temperatures ranging from 53° to 76°, with overnight lows between 43° and 59°. The average high for May is 67° with an average low of 50°. 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 Halton Hills. See also: June | July | August.
