S
M
T
W
T
F
S
30
91°
65°
31
91°
67°
1
93°
67°
2
95°
69°
3
96°
68°
4
97°
69°
5
94°
68°
6
90°
64°
7
88°
64°
8
87°
63°
9
90°
66°
10
87°
67°
11
88°
69°
12
79°
67°
13
89°
66°
14
85°
60°
15
92°
66°
16
92°
68°
17
93°
67°
18
92°
66°
19
84°
65°
20
90°
67°
21
91°
65°
22
80°
64°
23
78°
62°
24
77°
55°
25
75°
47°
26
76°
45°
27
74°
46°
28
76°
47°
29
81°
51°
30
83°
53°
1
85°
60°
2
N/A
3
71°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duff
Duff's September 2026 forecast shows daily high temperatures ranging from 71° to 71°, with overnight lows between 62° and 62°. The average high for September is 71° with an average low of 62°. 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 Duff. See also: October | November | December.