S
M
T
W
T
F
S
30
79°
54°
31
76°
58°
1
77°
60°
2
76°
52°
3
76°
51°
4
75°
58°
5
75°
60°
6
83°
59°
7
84°
58°
8
83°
54°
9
80°
56°
10
74°
57°
11
73°
55°
12
75°
58°
13
81°
54°
14
71°
45°
15
70°
45°
16
Hist. Avg.
75°
49°
17
Hist. Avg.
74°
48°
18
Hist. Avg.
74°
48°
19
Hist. Avg.
74°
47°
20
Hist. Avg.
73°
47°
21
Hist. Avg.
73°
46°
22
Hist. Avg.
72°
46°
23
Hist. Avg.
72°
45°
24
Hist. Avg.
72°
45°
25
Hist. Avg.
71°
44°
26
Hist. Avg.
71°
44°
27
Hist. Avg.
70°
44°
28
Hist. Avg.
70°
43°
29
Hist. Avg.
70°
43°
30
Hist. Avg.
69°
42°
1
Hist. Avg.
69°
42°
2
Hist. Avg.
68°
41°
3
Hist. Avg.
68°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Brooklyn
Brooklyn's September 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 45° and 60°. The average high for September is 77° with an average low of 55°. 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.
