S
M
T
W
T
F
S
30
78°
64°
31
77°
64°
1
78°
66°
2
77°
66°
3
77°
65°
4
76°
69°
5
77°
70°
6
80°
71°
7
83°
70°
8
82°
69°
9
79°
69°
10
79°
68°
11
80°
69°
12
78°
69°
13
79°
68°
14
73°
67°
15
73°
66°
16
74°
64°
17
73°
63°
18
75°
66°
19
76°
65°
20
75°
62°
21
81°
65°
22
81°
58°
23
78°
57°
24
71°
56°
25
69°
62°
26
70°
64°
27
75°
64°
28
77°
62°
29
77°
60°
30
76°
59°
1
75°
62°
2
75°
62°
3
77°
63°
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 69° to 83°, with overnight lows between 56° and 71°. The average high for September is 77° with an average low of 65°. 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.
