S
M
T
W
T
F
S
26
47°
39°
27
48°
38°
28
50°
41°
29
49°
38°
30
48°
40°
1
49°
39°
2
49°
36°
3
51°
41°
4
57°
47°
5
61°
42°
6
51°
40°
7
54°
47°
8
63°
49°
9
63°
47°
10
62°
43°
11
52°
43°
12
53°
45°
13
54°
48°
14
54°
47°
15
57°
49°
16
61°
50°
17
59°
49°
18
60°
43°
19
62°
40°
20
55°
41°
21
56°
40°
22
55°
40°
23
54°
41°
24
56°
43°
25
59°
47°
26
60°
48°
27
64°
40°
28
58°
45°
29
59°
51°
30
63°
44°
31
61°
46°
1
58°
48°
2
62°
46°
3
61°
52°
4
65°
55°
5
68°
47°
6
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hamilton
Hamilton's May 2026 forecast shows daily high temperatures ranging from 47° to 68°, with overnight lows between 36° and 55°. The average high for May is 57° with an average low of 44°. 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 Hamilton. See also: June | July | August.
