S
M
T
W
T
F
S
30
77°
63°
31
79°
63°
1
78°
60°
2
72°
58°
3
72°
56°
4
73°
57°
5
74°
61°
6
78°
62°
7
80°
62°
8
79°
61°
9
79°
61°
10
78°
60°
11
76°
60°
12
79°
60°
13
79°
61°
14
78°
49°
15
67°
50°
16
68°
52°
17
70°
53°
18
68°
48°
19
69°
50°
20
68°
52°
21
75°
55°
22
76°
55°
23
75°
46°
24
67°
45°
25
69°
49°
26
73°
54°
27
74°
53°
28
69°
45°
29
67°
41°
30
62°
44°
1
62°
52°
2
69°
48°
3
70°
53°
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 62° to 80°, with overnight lows between 41° and 63°. The average high for September is 73° with an average low of 54°. 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.
