S
M
T
W
T
F
S
30
77°
52°
31
78°
49°
1
79°
47°
2
75°
46°
3
73°
47°
4
76°
47°
5
76°
51°
6
79°
52°
7
81°
48°
8
75°
46°
9
74°
45°
10
74°
47°
11
75°
52°
12
80°
44°
13
75°
47°
14
74°
52°
15
82°
52°
16
81°
48°
17
82°
43°
18
71°
45°
19
73°
43°
20
78°
47°
21
78°
49°
22
79°
49°
23
78°
48°
24
78°
48°
25
70°
47°
26
73°
47°
27
76°
46°
28
76°
47°
29
75°
47°
30
77°
48°
1
77°
41°
2
67°
37°
3
65°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chatfield State Park
Chatfield State Park's September 2026 forecast shows daily high temperatures ranging from 65° to 82°, with overnight lows between 36° and 52°. The average high for September is 76° with an average low of 47°. 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 Chatfield State Park. See also: October | November | December.
