S
M
T
W
T
F
S
27
80°
52°
28
68°
58°
29
67°
54°
30
60°
50°
1
67°
52°
2
75°
49°
3
80°
50°
4
79°
50°
5
84°
51°
6
83°
53°
7
78°
51°
8
82°
51°
9
84°
51°
10
81°
53°
11
83°
63°
12
80°
51°
13
64°
49°
14
50°
42°
15
53°
38°
16
58°
31°
17
76°
37°
18
73°
41°
19
70°
41°
20
68°
45°
21
75°
43°
22
73°
56°
23
74°
59°
24
59°
39°
25
59°
40°
26
59°
39°
27
68°
37°
28
68°
38°
29
70°
42°
30
70°
43°
31
69°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Castle Rock
Castle Rock's October 2026 forecast shows daily high temperatures ranging from 59° to 70°, with overnight lows between 37° and 43°. The average high for October is 66° with an average low of 40°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Castle Rock. See also: November | December | January.
