S
M
T
W
T
F
S
30
63°
45°
31
65°
51°
1
66°
48°
2
66°
46°
3
64°
45°
4
62°
44°
5
69°
50°
6
71°
49°
7
70°
47°
8
71°
50°
9
70°
50°
10
70°
49°
11
68°
42°
12
63°
43°
13
67°
45°
14
64°
41°
15
59°
38°
16
63°
40°
17
67°
47°
18
66°
41°
19
57°
36°
20
52°
35°
21
53°
34°
22
51°
33°
23
53°
34°
24
56°
40°
25
61°
37°
26
60°
42°
27
55°
40°
28
51°
36°
29
52°
38°
30
53°
35°
1
53°
35°
2
54°
36°
3
49°
34°
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 49° to 71°, with overnight lows between 33° and 51°. The average high for September is 61° with an average low of 42°. 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.
