S
M
T
W
T
F
S
30
79°
70°
31
78°
68°
1
77°
66°
2
78°
66°
3
76°
67°
4
77°
65°
5
79°
66°
6
73°
62°
7
79°
68°
8
79°
65°
9
76°
69°
10
78°
67°
11
75°
64°
12
76°
67°
13
79°
64°
14
75°
61°
15
75°
61°
16
77°
65°
17
74°
66°
18
79°
60°
19
78°
58°
20
70°
57°
21
73°
64°
22
78°
65°
23
78°
62°
24
77°
58°
25
70°
59°
26
68°
56°
27
68°
55°
28
69°
56°
29
68°
55°
30
69°
56°
1
68°
56°
2
71°
54°
3
64°
53°
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 64° to 79°, with overnight lows between 53° and 70°. The average high for September is 75° with an average low of 62°. 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.
