S
M
T
W
T
F
S
30
92°
73°
31
94°
71°
1
92°
72°
2
91°
71°
3
90°
72°
4
89°
71°
5
90°
72°
6
92°
71°
7
93°
71°
8
92°
72°
9
92°
72°
10
91°
71°
11
90°
72°
12
90°
72°
13
90°
71°
14
90°
72°
15
89°
70°
16
90°
71°
17
92°
71°
18
91°
72°
19
90°
72°
20
92°
71°
21
91°
72°
22
90°
71°
23
88°
71°
24
89°
72°
25
89°
71°
26
90°
71°
27
90°
72°
28
Hist. Avg.
89°
72°
29
Hist. Avg.
89°
72°
30
Hist. Avg.
89°
72°
1
Hist. Avg.
89°
72°
2
Hist. Avg.
89°
71°
3
Hist. Avg.
88°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Brighton
Brighton's September 2026 forecast shows daily high temperatures ranging from 88° to 94°, with overnight lows between 70° and 73°. The average high for September is 91° with an average low of 71°. 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 Brighton. See also: October | November | December.
