S
M
T
W
T
F
S
30
81°
65°
31
86°
67°
1
87°
70°
2
93°
72°
3
93°
67°
4
87°
67°
5
77°
65°
6
76°
56°
7
78°
56°
8
84°
55°
9
78°
66°
10
80°
55°
11
80°
52°
12
84°
59°
13
76°
53°
14
72°
45°
15
88°
55°
16
75°
67°
17
77°
66°
18
74°
62°
19
66°
57°
20
64°
56°
21
63°
50°
22
63°
46°
23
62°
53°
24
N/A
25
67°
45°
26
71°
44°
27
72°
43°
28
72°
47°
29
77°
48°
30
68°
54°
1
82°
61°
2
64°
47°
3
65°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hamilton
Hamilton's September 2026 forecast shows daily high temperatures ranging from 65° to 65°, with overnight lows between 44° and 44°. The average high for September is 65° 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 September weather will actually feel in Hamilton. See also: October | November | December.
