S
M
T
W
T
F
S
30
77°
71°
31
84°
72°
1
88°
76°
2
92°
77°
3
85°
69°
4
78°
69°
5
76°
68°
6
75°
62°
7
76°
61°
8
83°
63°
9
89°
66°
10
77°
69°
11
75°
66°
12
76°
66°
13
79°
65°
14
68°
60°
15
83°
59°
16
78°
73°
17
75°
70°
18
84°
65°
19
73°
64°
20
70°
64°
21
65°
59°
22
66°
57°
23
67°
52°
24
69°
47°
25
67°
51°
26
70°
54°
27
70°
55°
28
69°
58°
29
73°
60°
30
74°
62°
1
73°
59°
2
72°
58°
3
72°
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 67° to 74°, with overnight lows between 47° and 62°. The average high for September is 71° with an average low of 56°. 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.
