S
M
T
W
T
F
S
30
80°
65°
31
79°
67°
1
80°
68°
2
79°
67°
3
79°
66°
4
80°
68°
5
84°
68°
6
85°
69°
7
86°
69°
8
85°
68°
9
82°
67°
10
82°
68°
11
83°
68°
12
84°
67°
13
82°
67°
14
77°
66°
15
76°
66°
16
75°
65°
17
75°
64°
18
77°
64°
19
79°
65°
20
79°
64°
21
82°
63°
22
83°
59°
23
82°
60°
24
75°
62°
25
73°
60°
26
72°
62°
27
79°
61°
28
80°
61°
29
81°
60°
30
80°
60°
1
78°
58°
2
78°
60°
3
79°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dover
Dover's September 2026 forecast shows daily high temperatures ranging from 72° to 86°, with overnight lows between 58° and 69°. The average high for September is 80° with an average low of 64°. 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 Dover. See also: October | November | December.
