S
M
T
W
T
F
S
29
48°
24°
30
61°
44°
31
66°
49°
1
72°
50°
2
50°
39°
3
57°
39°
4
67°
40°
5
55°
41°
6
53°
39°
7
56°
32°
8
45°
29°
9
47°
27°
10
53°
33°
11
63°
38°
12
54°
45°
13
65°
57°
14
76°
54°
15
82°
55°
16
73°
53°
17
66°
49°
18
63°
52°
19
60°
47°
20
59°
44°
21
60°
47°
22
62°
49°
23
64°
49°
24
60°
44°
25
56°
40°
26
57°
46°
27
57°
43°
28
58°
47°
29
61°
44°
30
63°
41°
1
58°
41°
2
58°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in East Islip
East Islip's April 2026 forecast shows daily high temperatures ranging from 54° to 82°, with overnight lows between 38° and 57°. The average high for April is 63° with an average low of 47°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in East Islip. See also: May | June | July.
