S
M
T
W
T
F
S
30
79°
52°
31
78°
53°
1
68°
61°
2
72°
61°
3
79°
60°
4
74°
53°
5
68°
52°
6
68°
45°
7
70°
46°
8
73°
50°
9
70°
59°
10
72°
50°
11
64°
47°
12
66°
50°
13
68°
50°
14
66°
47°
15
67°
50°
16
66°
47°
17
69°
45°
18
60°
40°
19
67°
46°
20
68°
46°
21
67°
45°
22
67°
46°
23
64°
45°
24
62°
41°
25
64°
44°
26
66°
47°
27
64°
46°
28
60°
42°
29
55°
38°
30
58°
39°
1
55°
36°
2
55°
37°
3
54°
41°
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 54° to 74°, with overnight lows between 36° and 59°. The average high for September is 65° with an average low of 46°. 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.
