S
M
T
W
T
F
S
30
65°
54°
31
65°
55°
1
66°
56°
2
67°
54°
3
66°
53°
4
65°
54°
5
66°
56°
6
65°
52°
7
66°
54°
8
65°
54°
9
67°
55°
10
69°
52°
11
65°
55°
12
65°
50°
13
68°
54°
14
68°
53°
15
67°
48°
16
64°
51°
17
66°
48°
18
66°
52°
19
67°
55°
20
67°
55°
21
68°
54°
22
67°
54°
23
66°
52°
24
65°
53°
25
65°
53°
26
63°
52°
27
66°
53°
28
64°
52°
29
66°
50°
30
65°
50°
1
Hist. Avg.
60°
48°
2
Hist. Avg.
60°
48°
3
Hist. Avg.
60°
48°
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 63° to 69°, with overnight lows between 48° and 56°. The average high for September is 66° with an average low of 53°. 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.
