S
M
T
W
T
F
S
29
50°
36°
30
57°
32°
31
57°
29°
1
54°
44°
2
56°
42°
3
63°
37°
4
72°
37°
5
80°
44°
6
76°
43°
7
63°
41°
8
70°
36°
9
75°
46°
10
72°
50°
11
63°
48°
12
60°
47°
13
57°
47°
14
54°
45°
15
58°
36°
16
64°
38°
17
60°
43°
18
59°
44°
19
61°
44°
20
61°
42°
21
62°
42°
22
63°
41°
23
58°
38°
24
58°
38°
25
57°
37°
26
59°
37°
27
63°
38°
28
63°
38°
29
60°
39°
30
60°
43°
1
61°
40°
2
60°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Castle Rock
Castle Rock's April 2026 forecast shows daily high temperatures ranging from 54° to 75°, with overnight lows between 36° and 50°. The average high for April is 61° with an average low of 42°. 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 Castle Rock. See also: May | June | July.
