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
55°
46°
11
64°
39°
12
56°
47°
13
65°
57°
14
79°
54°
15
70°
55°
16
73°
51°
17
70°
49°
18
63°
43°
19
59°
44°
20
56°
44°
21
58°
49°
22
60°
49°
23
65°
42°
24
56°
47°
25
57°
47°
26
56°
46°
27
56°
45°
28
58°
45°
29
57°
44°
30
57°
42°
1
58°
50°
2
67°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Central Islip
Central Islip's April 2026 forecast shows daily high temperatures ranging from 55° to 79°, with overnight lows between 39° and 57°. The average high for April is 62° 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 Central Islip. See also: May | June | July.
