S
M
T
W
T
F
S
26
90°
66°
27
86°
64°
28
88°
61°
29
90°
61°
30
91°
66°
1
90°
66°
2
93°
64°
3
72°
68°
4
81°
64°
5
84°
63°
6
91°
61°
7
93°
63°
8
93°
63°
9
95°
70°
10
93°
70°
11
91°
70°
12
88°
72°
13
93°
72°
14
90°
70°
15
90°
68°
16
91°
70°
17
90°
72°
18
88°
72°
19
90°
72°
20
90°
70°
21
90°
66°
22
93°
68°
23
93°
70°
24
91°
73°
25
93°
73°
26
93°
72°
27
90°
72°
28
88°
71°
29
90°
73°
30
89°
74°
31
88°
71°
1
88°
72°
2
84°
71°
3
81°
70°
4
87°
71°
5
87°
71°
6
88°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harlem
Harlem's May 2026 forecast shows daily high temperatures ranging from 81° to 90°, with overnight lows between 70° and 74°. The average high for May is 87° with an average low of 72°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Harlem. See also: June | July | August.