S
M
T
W
T
F
S
29
54°
39°
30
50°
43°
31
57°
46°
1
54°
41°
2
51°
36°
3
44°
33°
4
47°
32°
5
39°
30°
6
47°
40°
7
54°
44°
8
47°
35°
9
47°
39°
10
45°
35°
11
43°
35°
12
45°
37°
13
44°
35°
14
46°
36°
15
43°
38°
16
44°
37°
17
44°
40°
18
45°
40°
19
46°
41°
20
46°
41°
21
47°
40°
22
44°
37°
23
45°
41°
24
50°
40°
25
50°
39°
26
51°
40°
27
52°
41°
28
51°
42°
29
52°
43°
30
53°
41°
1
52°
41°
2
51°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Castleton
Castleton's April 2026 forecast shows daily high temperatures ranging from 39° to 54°, with overnight lows between 30° and 44°. The average high for April is 47° with an average low of 38°. 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 Castleton. See also: May | June | July.
