S
M
T
W
T
F
S
30
72°
52°
31
72°
51°
1
73°
51°
2
71°
55°
3
72°
56°
4
73°
57°
5
72°
58°
6
73°
59°
7
79°
58°
8
78°
57°
9
77°
57°
10
71°
56°
11
75°
57°
12
73°
57°
13
69°
56°
14
68°
55°
15
67°
54°
16
67°
55°
17
68°
55°
18
66°
54°
19
70°
53°
20
67°
53°
21
75°
53°
22
76°
46°
23
72°
42°
24
66°
43°
25
65°
51°
26
69°
50°
27
68°
52°
28
73°
50°
29
73°
47°
30
72°
49°
1
70°
50°
2
71°
48°
3
72°
47°
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 65° to 79°, with overnight lows between 42° and 59°. The average high for September is 71° 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.
