S
M
T
W
T
F
S
30
82°
66°
31
81°
65°
1
80°
66°
2
81°
68°
3
80°
71°
4
81°
65°
5
83°
66°
6
81°
65°
7
80°
64°
8
81°
63°
9
80°
65°
10
79°
66°
11
80°
63°
12
78°
63°
13
78°
62°
14
79°
63°
15
80°
68°
16
83°
67°
17
81°
61°
18
77°
60°
19
76°
61°
20
77°
65°
21
76°
60°
22
76°
61°
23
79°
65°
24
80°
64°
25
81°
65°
26
80°
57°
27
79°
58°
28
73°
57°
29
73°
56°
30
72°
56°
1
Hist. Avg.
75°
59°
2
Hist. Avg.
74°
58°
3
Hist. Avg.
74°
58°
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 72° to 83°, with overnight lows between 56° and 71°. The average high for September is 79° 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.
