S
M
T
W
T
F
S
26
57°
42°
27
68°
45°
28
65°
49°
29
62°
48°
30
60°
47°
1
64°
46°
2
61°
49°
3
59°
48°
4
73°
56°
5
80°
63°
6
67°
52°
7
58°
45°
8
62°
49°
9
61°
47°
10
66°
50°
11
63°
53°
12
67°
54°
13
63°
53°
14
66°
54°
15
69°
56°
16
68°
55°
17
74°
59°
18
76°
60°
19
75°
59°
20
74°
60°
21
73°
58°
22
73°
53°
23
68°
52°
24
66°
53°
25
68°
53°
26
69°
56°
27
69°
54°
28
70°
54°
29
69°
55°
30
69°
55°
31
70°
63°
1
74°
61°
2
72°
57°
3
71°
61°
4
76°
64°
5
74°
61°
6
73°
63°
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 58° to 80°, with overnight lows between 45° and 64°. The average high for May is 69° with an average low of 56°. 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.