S
M
T
W
T
F
S
30
97°
64°
31
97°
72°
1
99°
73°
2
100°
73°
3
100°
73°
4
100°
73°
5
102°
73°
6
99°
69°
7
95°
68°
8
96°
73°
9
100°
73°
10
94°
69°
11
89°
70°
12
94°
69°
13
93°
68°
14
88°
67°
15
88°
63°
16
92°
66°
17
90°
68°
18
88°
64°
19
82°
59°
20
83°
64°
21
86°
64°
22
85°
63°
23
84°
63°
24
85°
64°
25
85°
65°
26
84°
64°
27
84°
63°
28
83°
63°
29
84°
64°
30
84°
63°
1
81°
57°
2
73°
52°
3
70°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brighton
Brighton's September 2026 forecast shows daily high temperatures ranging from 70° to 100°, with overnight lows between 50° and 73°. The average high for September is 87° 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 Brighton. See also: October | November | December.
