S
M
T
W
T
F
S
30
87°
66°
31
88°
65°
1
82°
61°
2
84°
63°
3
88°
61°
4
89°
65°
5
88°
66°
6
87°
64°
7
87°
59°
8
81°
58°
9
82°
57°
10
83°
57°
11
84°
58°
12
85°
59°
13
84°
62°
14
85°
59°
15
84°
62°
16
85°
62°
17
82°
55°
18
79°
54°
19
76°
55°
20
76°
61°
21
77°
54°
22
77°
57°
23
78°
59°
24
76°
59°
25
78°
58°
26
80°
59°
27
81°
58°
28
79°
56°
29
75°
56°
30
75°
58°
1
74°
56°
2
75°
50°
3
74°
49°
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 74° to 89°, with overnight lows between 49° and 66°. The average high for September is 81° with an average low of 59°. 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.
