S
M
T
W
T
F
S
30
72°
50°
31
71°
49°
1
73°
52°
2
73°
56°
3
72°
59°
4
80°
59°
5
81°
58°
6
80°
50°
7
78°
49°
8
72°
50°
9
71°
49°
10
70°
52°
11
70°
54°
12
69°
50°
13
72°
52°
14
74°
54°
15
74°
53°
16
68°
54°
17
69°
53°
18
72°
52°
19
73°
45°
20
71°
48°
21
71°
46°
22
73°
44°
23
65°
44°
24
65°
45°
25
66°
45°
26
64°
43°
27
64°
42°
28
64°
44°
29
62°
41°
30
63°
41°
1
62°
46°
2
69°
41°
3
67°
45°
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 62° to 81°, with overnight lows between 41° and 59°. The average high for September is 70° with an average low of 49°. 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.
