S
M
T
W
T
F
S
30
66°
45°
31
68°
53°
1
74°
54°
2
76°
47°
3
78°
52°
4
76°
44°
5
67°
46°
6
68°
50°
7
73°
52°
8
66°
47°
9
65°
49°
10
64°
50°
11
65°
49°
12
64°
48°
13
64°
47°
14
66°
49°
15
73°
50°
16
73°
44°
17
68°
43°
18
66°
43°
19
72°
48°
20
71°
51°
21
65°
43°
22
63°
44°
23
61°
44°
24
62°
41°
25
62°
41°
26
63°
42°
27
62°
49°
28
61°
49°
29
62°
44°
30
62°
47°
1
66°
49°
2
63°
46°
3
58°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duvall
Duvall's September 2026 forecast shows daily high temperatures ranging from 58° to 78°, with overnight lows between 41° and 54°. The average high for September is 67° with an average low of 47°. 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 Duvall. See also: October | November | December.
