S
M
T
W
T
F
S
30
89°
71°
31
94°
74°
1
98°
74°
2
97°
75°
3
96°
77°
4
96°
75°
5
98°
74°
6
87°
71°
7
82°
66°
8
94°
67°
9
78°
68°
10
81°
64°
11
82°
62°
12
82°
64°
13
76°
57°
14
82°
58°
15
90°
65°
16
79°
64°
17
93°
71°
18
85°
71°
19
84°
73°
20
75°
65°
21
65°
62°
22
66°
57°
23
68°
52°
24
70°
59°
25
68°
61°
26
66°
59°
27
64°
55°
28
77°
55°
29
82°
52°
30
75°
63°
1
72°
59°
2
68°
50°
3
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hamilton
Hamilton's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Hamilton. See also: October | November | December.
