S
M
T
W
T
F
S
30
90°
69°
31
91°
72°
1
91°
71°
2
91°
72°
3
91°
71°
4
86°
73°
5
90°
73°
6
95°
75°
7
96°
72°
8
92°
71°
9
92°
72°
10
88°
71°
11
90°
71°
12
90°
72°
13
91°
70°
14
90°
69°
15
89°
68°
16
89°
69°
17
90°
68°
18
88°
66°
19
87°
62°
20
85°
64°
21
89°
69°
22
89°
68°
23
88°
67°
24
88°
67°
25
87°
66°
26
87°
67°
27
86°
66°
28
86°
66°
29
85°
67°
30
86°
66°
1
86°
60°
2
83°
58°
3
76°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brookhaven
Brookhaven's September 2026 forecast shows daily high temperatures ranging from 76° to 96°, with overnight lows between 56° and 72°. The average high for September is 88° with an average low of 67°. 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 Brookhaven. See also: October | November | December.
