S
M
T
W
T
F
S
30
68°
56°
31
71°
54°
1
70°
54°
2
70°
55°
3
65°
54°
4
68°
53°
5
69°
52°
6
69°
52°
7
67°
56°
8
74°
50°
9
77°
55°
10
68°
52°
11
67°
51°
12
63°
46°
13
68°
46°
14
74°
49°
15
73°
50°
16
74°
51°
17
75°
51°
18
75°
49°
19
73°
51°
20
69°
51°
21
66°
47°
22
63°
48°
23
62°
45°
24
66°
48°
25
68°
51°
26
62°
49°
27
61°
47°
28
59°
44°
29
59°
41°
30
60°
42°
1
64°
47°
2
68°
49°
3
66°
48°
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 59° to 77°, with overnight lows between 41° and 55°. The average high for September is 67° with an average low of 48°. 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.
