S
M
T
W
T
F
S
30
100°
74°
31
99°
77°
1
100°
83°
2
100°
79°
3
100°
78°
4
100°
76°
5
103°
77°
6
104°
73°
7
101°
76°
8
101°
78°
9
101°
72°
10
83°
65°
11
93°
71°
12
93°
72°
13
93°
70°
14
94°
65°
15
82°
59°
16
83°
60°
17
81°
59°
18
78°
54°
19
74°
55°
20
78°
54°
21
80°
56°
22
85°
62°
23
86°
63°
24
86°
63°
25
85°
62°
26
83°
61°
27
83°
61°
28
84°
60°
29
83°
61°
30
79°
55°
1
75°
50°
2
69°
47°
3
68°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duquesne
Duquesne's September 2026 forecast shows daily high temperatures ranging from 68° to 101°, with overnight lows between 46° and 78°. The average high for September is 84° with an average low of 61°. 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 Duquesne. See also: October | November | December.
