S
M
T
W
T
F
S
30
84°
67°
31
79°
63°
1
76°
63°
2
76°
64°
3
75°
62°
4
76°
63°
5
77°
70°
6
76°
70°
7
78°
70°
8
82°
68°
9
82°
68°
10
79°
69°
11
82°
69°
12
83°
68°
13
81°
69°
14
78°
65°
15
81°
58°
16
74°
57°
17
72°
57°
18
72°
58°
19
73°
62°
20
72°
65°
21
74°
64°
22
71°
63°
23
77°
65°
24
78°
64°
25
78°
64°
26
77°
65°
27
78°
61°
28
77°
53°
29
76°
52°
30
67°
57°
1
66°
55°
2
67°
59°
3
66°
55°
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 84°, with overnight lows between 52° and 70°. 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.
