S
M
T
W
T
F
S
30
73°
64°
31
84°
66°
1
89°
69°
2
92°
71°
3
84°
67°
4
75°
66°
5
78°
58°
6
75°
55°
7
76°
53°
8
81°
56°
9
75°
68°
10
77°
56°
11
76°
50°
12
82°
59°
13
73°
51°
14
68°
46°
15
75°
58°
16
70°
63°
17
65°
60°
18
72°
54°
19
62°
55°
20
64°
55°
21
60°
46°
22
64°
45°
23
66°
48°
24
69°
47°
25
64°
40°
26
69°
40°
27
71°
43°
28
73°
46°
29
77°
46°
30
66°
54°
1
74°
61°
2
66°
43°
3
64°
44°
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 66°, with overnight lows between 43° and 44°. The average high for September is 65° with an average low of 44°. 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.
