S
M
T
W
T
F
S
26
25°
15°
27
41°
20°
28
50°
21°
29
53°
24°
30
60°
30°
1
73°
34°
2
64°
39°
3
70°
38°
4
48°
26°
5
43°
24°
6
60°
22°
7
67°
33°
8
69°
38°
9
61°
39°
10
72°
40°
11
66°
38°
12
70°
34°
13
83°
49°
14
54°
39°
15
57°
38°
16
54°
37°
17
45°
29°
18
53°
30°
19
67°
38°
20
64°
42°
21
65°
39°
22
69°
46°
23
77°
49°
24
78°
51°
25
79°
48°
26
71°
46°
27
74°
47°
28
73°
47°
29
78°
49°
30
71°
45°
31
73°
46°
1
71°
47°
2
73°
49°
3
76°
51°
4
77°
51°
5
74°
50°
6
68°
47°
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 53° to 79°, with overnight lows between 30° and 51°. The average high for May is 72° with an average low of 46°. 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.