S
M
T
W
T
F
S
30
83°
69°
31
76°
63°
1
76°
63°
2
77°
64°
3
76°
69°
4
77°
67°
5
78°
65°
6
79°
65°
7
80°
66°
8
81°
65°
9
82°
65°
10
82°
68°
11
81°
69°
12
81°
69°
13
82°
68°
14
80°
68°
15
77°
67°
16
73°
62°
17
72°
59°
18
72°
58°
19
79°
65°
20
77°
60°
21
71°
57°
22
70°
57°
23
76°
60°
24
79°
64°
25
79°
64°
26
78°
63°
27
77°
64°
28
74°
62°
29
71°
63°
30
70°
61°
1
69°
59°
2
68°
55°
3
66°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Brooklyn
Brooklyn's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 49° and 69°. The average high for September is 76° with an average low of 63°. 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.
