S
M
T
W
T
F
S
30
79°
52°
31
78°
53°
1
68°
61°
2
72°
61°
3
79°
60°
4
82°
58°
5
75°
56°
6
64°
44°
7
71°
47°
8
73°
54°
9
70°
64°
10
74°
50°
11
64°
42°
12
66°
48°
13
71°
52°
14
69°
51°
15
65°
46°
16
63°
44°
17
62°
48°
18
63°
47°
19
62°
44°
20
68°
46°
21
60°
47°
22
58°
47°
23
60°
46°
24
62°
46°
25
64°
47°
26
65°
42°
27
58°
38°
28
61°
43°
29
65°
46°
30
66°
46°
1
66°
45°
2
64°
46°
3
62°
44°
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 58° to 74°, with overnight lows between 38° and 64°. The average high for September is 65° 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 Dover. See also: October | November | December.
