S
M
T
W
T
F
S
29
54°
34°
30
52°
37°
31
63°
45°
1
54°
38°
2
49°
40°
3
53°
37°
4
55°
40°
5
49°
36°
6
53°
43°
7
58°
43°
8
55°
41°
9
54°
40°
10
52°
38°
11
49°
38°
12
50°
39°
13
49°
40°
14
50°
42°
15
48°
41°
16
50°
40°
17
49°
43°
18
49°
43°
19
52°
41°
20
51°
42°
21
52°
40°
22
49°
38°
23
49°
44°
24
55°
44°
25
54°
41°
26
55°
40°
27
56°
42°
28
55°
44°
29
55°
44°
30
56°
40°
1
55°
43°
2
56°
45°
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 48° to 58°, with overnight lows between 36° and 45°. The average high for April is 52° 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.
