S
M
T
W
T
F
S
26
82°
69°
27
83°
70°
28
83°
69°
29
82°
70°
30
84°
71°
31
85°
71°
1
84°
70°
2
82°
68°
3
80°
65°
4
78°
66°
5
78°
65°
6
77°
64°
7
79°
68°
8
81°
68°
9
83°
69°
10
84°
69°
11
83°
68°
12
82°
68°
13
83°
69°
14
84°
67°
15
82°
69°
16
78°
69°
17
79°
68°
18
84°
69°
19
83°
68°
20
82°
62°
21
83°
60°
22
77°
60°
23
77°
62°
24
78°
62°
25
77°
60°
26
77°
66°
27
78°
61°
28
78°
60°
29
77°
60°
30
76°
58°
31
75°
58°
1
75°
59°
2
76°
60°
3
74°
61°
4
74°
59°
5
77°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hamilton
Hamilton's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 58° and 71°. The average high for August is 80° with an average low of 65°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Hamilton. See also: September | October | November.