S
M
T
W
T
F
S
30
78°
60°
31
76°
61°
1
79°
60°
2
82°
55°
3
81°
50°
4
73°
52°
5
73°
59°
6
80°
54°
7
77°
50°
8
72°
52°
9
71°
55°
10
72°
58°
11
73°
57°
12
80°
58°
13
79°
56°
14
79°
50°
15
75°
49°
16
69°
51°
17
70°
47°
18
70°
46°
19
69°
44°
20
67°
44°
21
66°
46°
22
67°
52°
23
70°
45°
24
70°
51°
25
73°
53°
26
69°
52°
27
75°
53°
28
75°
49°
29
74°
46°
30
64°
47°
1
67°
48°
2
72°
49°
3
65°
40°
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 64° to 82°, with overnight lows between 40° and 61°. The average high for September is 73° with an average low of 51°. 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.
