S
M
T
W
T
F
S
30
90°
72°
31
88°
73°
1
90°
73°
2
91°
73°
3
93°
75°
4
93°
75°
5
95°
73°
6
93°
73°
7
91°
75°
8
90°
74°
9
90°
76°
10
91°
74°
11
92°
73°
12
93°
75°
13
91°
74°
14
92°
73°
15
91°
74°
16
91°
74°
17
90°
73°
18
90°
74°
19
91°
73°
20
88°
74°
21
89°
73°
22
87°
74°
23
88°
72°
24
86°
74°
25
87°
74°
26
86°
73°
27
86°
74°
28
87°
74°
29
87°
73°
30
86°
74°
1
86°
74°
2
87°
73°
3
87°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Harlem
Harlem's September 2026 forecast shows daily high temperatures ranging from 86° to 93°, with overnight lows between 72° and 76°. The average high for September is 89° with an average low of 74°. 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 Harlem. See also: October | November | December.
