S
M
T
W
T
F
S
30
93°
67°
31
87°
69°
1
93°
70°
2
92°
69°
3
89°
68°
4
86°
66°
5
89°
67°
6
89°
68°
7
88°
68°
8
87°
69°
9
88°
68°
10
90°
68°
11
89°
67°
12
90°
67°
13
90°
66°
14
89°
67°
15
90°
67°
16
91°
66°
17
87°
66°
18
87°
65°
19
83°
65°
20
82°
64°
21
85°
62°
22
87°
61°
23
85°
64°
24
87°
60°
25
87°
63°
26
82°
63°
27
84°
62°
28
85°
62°
29
84°
61°
30
80°
58°
1
78°
54°
2
78°
53°
3
76°
52°
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 76° to 93°, with overnight lows between 52° and 70°. The average high for September is 86° with an average low of 64°. 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.
