S
M
T
W
T
F
S
30
91°
67°
31
90°
66°
1
90°
65°
2
89°
64°
3
89°
66°
4
88°
60°
5
87°
65°
6
89°
63°
7
88°
64°
8
87°
63°
9
87°
65°
10
88°
64°
11
87°
64°
12
83°
63°
13
82°
63°
14
82°
62°
15
83°
62°
16
83°
61°
17
82°
60°
18
82°
59°
19
81°
58°
20
80°
54°
21
79°
54°
22
79°
55°
23
81°
57°
24
82°
59°
25
83°
60°
26
82°
59°
27
83°
58°
28
78°
53°
29
79°
51°
30
80°
56°
1
81°
56°
2
Hist. Avg.
78°
55°
3
Hist. Avg.
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dewey
Dewey's September 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 51° and 67°. The average high for September is 84° with an average low of 60°. 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 Dewey. See also: October | November | December.
