S
M
T
W
T
F
S
31
80°
58°
1
79°
53°
2
79°
54°
3
83°
53°
4
87°
57°
5
90°
63°
6
91°
69°
7
71°
61°
8
76°
54°
9
76°
53°
10
78°
61°
11
80°
64°
12
82°
61°
13
82°
54°
14
82°
55°
15
78°
59°
16
74°
60°
17
73°
60°
18
84°
58°
19
90°
61°
20
89°
61°
21
82°
62°
22
84°
61°
23
89°
60°
24
92°
66°
25
90°
73°
26
86°
71°
27
79°
70°
28
78°
67°
29
70°
66°
30
72°
65°
1
74°
55°
2
73°
50°
3
73°
48°
4
79°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duke University
Duke University'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 Duke University. See also: October | November | December.