S
M
T
W
T
F
S
29
69°
36°
30
59°
35°
31
36°
27°
1
37°
28°
2
36°
28°
3
32°
24°
4
43°
28°
5
51°
32°
6
32°
27°
7
65°
23°
8
46°
27°
9
48°
28°
10
60°
28°
11
74°
42°
12
69°
49°
13
60°
37°
14
64°
36°
15
67°
36°
16
60°
29°
17
40°
21°
18
49°
21°
19
57°
27°
20
76°
30°
21
79°
37°
22
86°
45°
23
51°
35°
24
44°
30°
25
47°
21°
26
46°
27°
27
38°
29°
28
50°
30°
29
55°
32°
30
51°
32°
1
60°
37°
2
67°
40°
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 50° to 67°, with overnight lows between 30° and 40°. The average high for April is 57° with an average low of 34°. 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.
