S
M
T
W
T
F
S
30
70°
63°
31
68°
63°
1
68°
63°
2
70°
64°
3
70°
66°
4
70°
64°
5
68°
54°
6
75°
50°
7
72°
59°
8
64°
51°
9
69°
52°
10
67°
58°
11
70°
56°
12
69°
57°
13
69°
57°
14
71°
60°
15
70°
57°
16
68°
56°
17
68°
57°
18
68°
57°
19
69°
58°
20
68°
56°
21
69°
57°
22
69°
56°
23
68°
56°
24
69°
55°
25
68°
54°
26
66°
54°
27
65°
53°
28
66°
54°
29
65°
51°
30
66°
53°
1
65°
48°
2
66°
54°
3
66°
54°
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 64° to 72°, with overnight lows between 48° and 60°. The average high for September is 68° with an average low of 55°. 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.
