S
M
T
W
T
F
S
30
88°
75°
31
87°
76°
1
88°
75°
2
91°
76°
3
90°
74°
4
88°
74°
5
90°
73°
6
88°
74°
7
88°
73°
8
87°
71°
9
90°
73°
10
90°
71°
11
89°
71°
12
91°
72°
13
90°
74°
14
90°
75°
15
89°
72°
16
88°
73°
17
89°
74°
18
88°
75°
19
87°
74°
20
87°
74°
21
85°
73°
22
87°
73°
23
87°
72°
24
86°
73°
25
Hist. Avg.
86°
71°
26
Hist. Avg.
85°
71°
27
Hist. Avg.
85°
70°
28
Hist. Avg.
85°
70°
29
Hist. Avg.
85°
70°
30
Hist. Avg.
84°
70°
1
Hist. Avg.
84°
69°
2
Hist. Avg.
84°
69°
3
Hist. Avg.
84°
69°
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 85° to 91°, with overnight lows between 71° and 76°. The average high for September is 88° with an average low of 73°. 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.
