S
M
T
W
T
F
S
30
90°
74°
31
90°
73°
1
89°
74°
2
89°
74°
3
90°
73°
4
90°
75°
5
89°
74°
6
89°
72°
7
90°
73°
8
89°
74°
9
90°
75°
10
90°
75°
11
89°
74°
12
91°
74°
13
90°
73°
14
90°
72°
15
89°
74°
16
89°
74°
17
90°
73°
18
90°
75°
19
89°
74°
20
90°
75°
21
91°
74°
22
90°
73°
23
90°
74°
24
89°
73°
25
89°
73°
26
89°
73°
27
89°
74°
28
Hist. Avg.
89°
75°
29
Hist. Avg.
89°
75°
30
Hist. Avg.
89°
75°
1
Hist. Avg.
89°
75°
2
Hist. Avg.
89°
75°
3
Hist. Avg.
89°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Brooklyn
Brooklyn's September 2026 forecast shows daily high temperatures ranging from 89° to 91°, with overnight lows between 72° and 75°. The average high for September is 90° with an average low of 74°. 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 Brooklyn. See also: October | November | December.
