S
M
T
W
T
F
S
30
80°
63°
31
88°
71°
1
88°
73°
2
93°
71°
3
95°
71°
4
85°
68°
5
86°
61°
6
79°
56°
7
81°
56°
8
86°
57°
9
89°
70°
10
85°
65°
11
84°
58°
12
77°
64°
13
86°
60°
14
76°
50°
15
85°
53°
16
85°
69°
17
77°
64°
18
76°
56°
19
78°
66°
20
73°
58°
21
73°
59°
22
74°
56°
23
71°
55°
24
72°
54°
25
73°
51°
26
72°
53°
27
73°
54°
28
71°
53°
29
72°
48°
30
72°
55°
1
73°
54°
2
68°
53°
3
65°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chatfield
Chatfield's September 2026 forecast shows daily high temperatures ranging from 65° to 85°, with overnight lows between 48° and 69°. The average high for September is 73° with an average low of 56°. 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. See also: October | November | December.