S
M
T
W
T
F
S
29
54°
44°
30
54°
45°
31
55°
50°
1
52°
43°
2
48°
36°
3
54°
43°
4
50°
43°
5
48°
37°
6
52°
36°
7
57°
41°
8
59°
45°
9
50°
43°
10
50°
39°
11
50°
43°
12
52°
41°
13
52°
36°
14
52°
43°
15
54°
48°
16
54°
48°
17
54°
48°
18
54°
43°
19
54°
39°
20
52°
45°
21
56°
44°
22
57°
45°
23
59°
47°
24
59°
46°
25
58°
46°
26
56°
46°
27
56°
46°
28
55°
45°
29
56°
45°
30
55°
44°
1
54°
43°
2
53°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Castletown
Castletown's April 2026 forecast shows daily high temperatures ranging from 52° to 59°, with overnight lows between 43° and 47°. The average high for April is 56° 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 Castletown. See also: May | June | July.
