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
48°
31°
9
50°
37°
10
56°
49°
11
63°
40°
12
56°
44°
13
63°
54°
14
76°
58°
15
70°
47°
16
56°
43°
17
54°
45°
18
58°
48°
19
62°
49°
20
58°
48°
21
65°
43°
22
65°
45°
23
56°
42°
24
57°
47°
25
57°
46°
26
56°
46°
27
57°
45°
28
58°
44°
29
57°
44°
30
58°
42°
1
59°
50°
2
67°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Smithtown
Smithtown's April 2026 forecast shows daily high temperatures ranging from 48° to 76°, with overnight lows between 31° and 58°. The average high for April is 59° with an average low of 45°. 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 Smithtown. See also: May | June | July.
