S
M
T
W
T
F
S
30
82°
69°
31
84°
63°
1
89°
63°
2
88°
64°
3
86°
70°
4
90°
70°
5
81°
68°
6
70°
64°
7
77°
66°
8
81°
64°
9
81°
55°
10
79°
50°
11
81°
54°
12
70°
50°
13
68°
45°
14
66°
52°
15
68°
52°
16
73°
50°
17
68°
63°
18
72°
61°
19
63°
59°
20
66°
57°
21
57°
52°
22
59°
50°
23
68°
46°
24
64°
50°
25
66°
55°
26
N/A
27
64°
57°
28
70°
57°
29
68°
54°
30
72°
64°
1
64°
46°
2
64°
37°
3
72°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Duncan
Duncan's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Duncan. See also: October | November | December.
