S
M
T
W
T
F
S
30
85°
57°
31
83°
55°
1
80°
54°
2
79°
56°
3
80°
56°
4
80°
55°
5
83°
57°
6
78°
62°
7
86°
60°
8
84°
54°
9
78°
54°
10
78°
52°
11
77°
52°
12
77°
54°
13
76°
53°
14
75°
52°
15
77°
57°
16
78°
55°
17
77°
52°
18
78°
52°
19
79°
58°
20
79°
53°
21
80°
51°
22
Hist. Avg.
78°
51°
23
Hist. Avg.
77°
51°
24
Hist. Avg.
77°
51°
25
Hist. Avg.
76°
50°
26
Hist. Avg.
76°
50°
27
Hist. Avg.
76°
49°
28
Hist. Avg.
75°
49°
29
Hist. Avg.
75°
49°
30
Hist. Avg.
74°
48°
1
Hist. Avg.
74°
48°
2
Hist. Avg.
74°
47°
3
Hist. Avg.
73°
47°
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 75° to 86°, with overnight lows between 51° and 62°. The average high for September is 79° with an average low of 55°. 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.
