S
M
T
W
T
F
S
26
86°
61°
27
89°
64°
28
79°
68°
29
84°
64°
30
73°
58°
1
66°
55°
2
73°
50°
3
75°
42°
4
82°
48°
5
79°
57°
6
83°
58°
7
73°
56°
8
71°
52°
9
76°
60°
10
83°
59°
11
79°
62°
12
83°
54°
13
85°
55°
14
79°
53°
15
84°
50°
16
85°
62°
17
86°
86°
18
91°
67°
19
92°
71°
20
89°
72°
21
73°
71°
22
76°
71°
23
87°
70°
24
85°
70°
25
77°
70°
26
86°
71°
27
88°
71°
28
87°
71°
29
88°
73°
30
90°
73°
31
92°
70°
1
91°
69°
2
86°
62°
3
83°
57°
4
87°
61°
5
89°
68°
6
87°
72°
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 83° to 92°, with overnight lows between 57° and 72°. The average high for May is 88° with an average low of 66°. 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.