S
M
T
W
T
F
S
30
79°
52°
31
82°
55°
1
84°
54°
2
84°
51°
3
76°
52°
4
77°
49°
5
75°
48°
6
76°
52°
7
83°
53°
8
83°
53°
9
79°
52°
10
80°
53°
11
81°
49°
12
81°
49°
13
77°
46°
14
75°
44°
15
74°
45°
16
74°
47°
17
77°
48°
18
79°
50°
19
77°
49°
20
Hist. Avg.
74°
46°
21
Hist. Avg.
74°
46°
22
Hist. Avg.
74°
45°
23
Hist. Avg.
73°
45°
24
Hist. Avg.
73°
44°
25
Hist. Avg.
72°
44°
26
Hist. Avg.
72°
44°
27
Hist. Avg.
71°
43°
28
Hist. Avg.
71°
43°
29
Hist. Avg.
70°
42°
30
Hist. Avg.
70°
42°
1
Hist. Avg.
70°
42°
2
Hist. Avg.
69°
41°
3
Hist. Avg.
69°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Castle Pines
Castle Pines's September 2026 forecast shows daily high temperatures ranging from 74° to 84°, with overnight lows between 44° and 55°. The average high for September is 79° with an average low of 50°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Castle Pines. See also: October | November | December.
