S
M
T
W
T
F
S
28
67°
56°
29
64°
54°
30
63°
53°
1
66°
53°
2
74°
55°
3
76°
58°
4
75°
56°
5
82°
55°
6
87°
53°
7
80°
59°
8
75°
50°
9
76°
54°
10
74°
53°
11
74°
49°
12
81°
53°
13
85°
54°
14
84°
56°
15
84°
54°
16
83°
56°
17
86°
55°
18
85°
56°
19
80°
55°
20
78°
53°
21
81°
53°
22
83°
54°
23
84°
56°
24
84°
55°
25
80°
51°
26
78°
51°
27
83°
52°
28
81°
52°
29
78°
56°
30
78°
54°
31
83°
55°
1
83°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Castle Rock
Castle Rock's July 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 49° and 59°. The average high for July is 81° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Castle Rock. See also: August | September | October.