S
M
T
W
T
F
S
30
78°
65°
31
84°
69°
1
88°
68°
2
91°
71°
3
87°
66°
4
77°
66°
5
74°
59°
6
78°
55°
7
78°
50°
8
81°
66°
9
82°
63°
10
75°
49°
11
77°
56°
12
81°
58°
13
80°
61°
14
79°
63°
15
75°
56°
16
73°
49°
17
76°
53°
18
76°
52°
19
72°
51°
20
71°
48°
21
74°
54°
22
67°
53°
23
69°
54°
24
73°
53°
25
76°
53°
26
76°
52°
27
74°
52°
28
76°
53°
29
76°
54°
30
76°
54°
1
76°
51°
2
72°
46°
3
62°
42°
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 62° to 82°, with overnight lows between 42° and 66°. The average high for September is 75° with an average low of 54°. 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.
