S
M
T
W
T
F
S
26
59°
47°
27
58°
46°
28
59°
46°
29
60°
47°
30
57°
48°
1
58°
48°
2
60°
47°
3
59°
43°
4
58°
42°
5
58°
43°
6
60°
42°
7
61°
46°
8
61°
51°
9
62°
49°
10
63°
47°
11
62°
45°
12
60°
46°
13
59°
45°
14
60°
46°
15
62°
46°
16
63°
47°
17
63°
48°
18
64°
49°
19
64°
47°
20
65°
47°
21
66°
51°
22
65°
51°
23
66°
56°
24
66°
57°
25
74°
57°
26
73°
55°
27
67°
58°
28
75°
58°
29
77°
52°
30
75°
52°
31
68°
54°
1
67°
53°
2
70°
52°
3
71°
58°
4
77°
60°
5
77°
60°
6
71°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in East Islip
East Islip's May 2026 forecast shows daily high temperatures ranging from 57° to 77°, with overnight lows between 42° and 60°. The average high for May is 65° with an average low of 50°. 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 East Islip. See also: June | July | August.
