S
M
T
W
T
F
S
29
76°
46°
30
76°
46°
31
57°
40°
1
54°
35°
2
73°
33°
3
52°
32°
4
60°
26°
5
66°
30°
6
69°
38°
7
71°
33°
8
71°
41°
9
72°
35°
10
65°
37°
11
76°
48°
12
76°
44°
13
72°
44°
14
57°
38°
15
65°
36°
16
76°
44°
17
59°
23°
18
56°
18°
19
70°
32°
20
77°
40°
21
82°
44°
22
81°
52°
23
59°
34°
24
71°
31°
25
64°
36°
26
57°
35°
27
55°
32°
28
65°
40°
29
53°
35°
30
45°
33°
1
52°
38°
2
62°
42°
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 45° to 71°, with overnight lows between 31° and 42°. The average high for April is 58° with an average low of 36°. 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.
