S
M
T
W
T
F
S
31
77°
58°
1
70°
57°
2
77°
57°
3
81°
64°
4
76°
63°
5
77°
62°
6
70°
61°
7
71°
55°
8
69°
57°
9
71°
57°
10
74°
56°
11
73°
56°
12
68°
53°
13
68°
55°
14
67°
54°
15
69°
53°
16
78°
55°
17
77°
58°
18
69°
52°
19
71°
54°
20
71°
54°
21
70°
51°
22
68°
51°
23
72°
53°
24
69°
54°
25
60°
48°
26
64°
51°
27
66°
54°
28
61°
50°
29
59°
51°
30
56°
48°
1
61°
48°
2
60°
50°
3
56°
48°
4
58°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duncan
Duncan's September 2025 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.
