S
M
T
W
T
F
S
29
50°
39°
30
55°
43°
31
57°
46°
1
52°
45°
2
50°
37°
3
54°
46°
4
55°
46°
5
55°
39°
6
59°
42°
7
67°
47°
8
66°
48°
9
57°
40°
10
62°
41°
11
58°
41°
12
59°
38°
13
58°
38°
14
59°
41°
15
58°
40°
16
59°
41°
17
60°
42°
18
57°
41°
19
55°
37°
20
58°
42°
21
61°
42°
22
61°
43°
23
62°
43°
24
63°
42°
25
61°
43°
26
59°
41°
27
56°
38°
28
56°
38°
29
57°
40°
30
58°
44°
1
61°
45°
2
59°
42°
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 55° to 67°, with overnight lows between 37° and 48°. The average high for April is 59° with an average low of 41°. 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.
