S
M
T
W
T
F
S
30
62°
53°
31
68°
52°
1
69°
54°
2
64°
53°
3
61°
51°
4
63°
47°
5
67°
54°
6
71°
53°
7
65°
54°
8
68°
53°
9
69°
52°
10
66°
53°
11
60°
51°
12
67°
53°
13
66°
54°
14
64°
54°
15
64°
54°
16
71°
54°
17
70°
51°
18
65°
49°
19
64°
50°
20
66°
48°
21
64°
49°
22
N/A
23
64°
50°
24
57°
49°
25
56°
49°
26
55°
46°
27
N/A
28
61°
46°
29
60°
50°
30
58°
46°
1
56°
49°
2
63°
52°
3
65°
54°
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.
