S
M
T
W
T
F
S
30
92°
74°
31
90°
74°
1
90°
75°
2
91°
74°
3
90°
73°
4
90°
73°
5
91°
74°
6
92°
73°
7
93°
72°
8
92°
73°
9
93°
73°
10
93°
74°
11
91°
73°
12
93°
73°
13
93°
74°
14
92°
75°
15
90°
75°
16
91°
74°
17
90°
72°
18
89°
71°
19
89°
73°
20
90°
74°
21
88°
72°
22
89°
73°
23
89°
73°
24
90°
71°
25
89°
70°
26
90°
69°
27
90°
70°
28
89°
72°
29
89°
73°
30
90°
72°
1
Hist. Avg.
88°
72°
2
Hist. Avg.
88°
72°
3
Hist. Avg.
88°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Hamilton
Lake Hamilton's September 2026 forecast shows daily high temperatures ranging from 88° to 93°, with overnight lows between 69° and 75°. The average high for September is 91° with an average low of 73°. 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 Lake Hamilton. See also: October | November | December.