S
M
T
W
T
F
S
30
85°
50°
31
78°
54°
1
71°
60°
2
78°
56°
3
77°
61°
4
85°
58°
5
73°
52°
6
69°
47°
7
80°
42°
8
82°
56°
9
80°
69°
10
84°
57°
11
77°
48°
12
77°
55°
13
77°
59°
14
79°
55°
15
73°
60°
16
78°
55°
17
69°
54°
18
68°
52°
19
68°
48°
20
66°
50°
21
69°
49°
22
66°
54°
23
65°
53°
24
68°
53°
25
68°
52°
26
69°
51°
27
64°
49°
28
66°
51°
29
71°
52°
30
71°
52°
1
70°
51°
2
69°
51°
3
68°
50°
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 84°, with overnight lows between 48° and 69°. The average high for September is 72° with an average low of 53°. 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.
