S
M
T
W
T
F
S
26
64°
50°
27
63°
42°
28
74°
40°
29
75°
43°
30
80°
44°
1
79°
46°
2
60°
52°
3
63°
52°
4
66°
44°
5
61°
50°
6
73°
52°
7
85°
51°
8
77°
46°
9
78°
47°
10
86°
50°
11
83°
45°
12
80°
52°
13
69°
51°
14
85°
43°
15
83°
45°
16
69°
48°
17
74°
43°
18
81°
61°
19
88°
44°
20
86°
46°
21
87°
48°
22
77°
49°
23
71°
52°
24
69°
51°
25
68°
51°
26
65°
50°
27
72°
50°
28
73°
51°
29
69°
50°
30
68°
49°
31
70°
50°
1
72°
52°
2
75°
53°
3
74°
53°
4
74°
54°
5
73°
52°
6
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Castle Rock State Park
Castle Rock State Park's May 2026 forecast shows daily high temperatures ranging from 65° to 75°, with overnight lows between 49° and 54°. The average high for May is 71° with an average low of 51°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Castle Rock State Park. See also: June | July | August.
