S
M
T
W
T
F
S
30
72°
57°
31
73°
58°
1
77°
55°
2
75°
54°
3
76°
51°
4
74°
51°
5
72°
52°
6
77°
56°
7
78°
56°
8
77°
55°
9
77°
56°
10
76°
55°
11
74°
55°
12
77°
54°
13
77°
55°
14
76°
55°
15
76°
53°
16
75°
47°
17
72°
49°
18
67°
53°
19
72°
54°
20
75°
53°
21
74°
52°
22
73°
47°
23
71°
44°
24
Hist. Avg.
68°
43°
25
Hist. Avg.
67°
43°
26
Hist. Avg.
67°
43°
27
Hist. Avg.
67°
42°
28
Hist. Avg.
66°
42°
29
Hist. Avg.
66°
41°
30
Hist. Avg.
66°
41°
1
Hist. Avg.
65°
41°
2
Hist. Avg.
65°
40°
3
Hist. Avg.
64°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Dover
Dover's September 2026 forecast shows daily high temperatures ranging from 67° to 78°, with overnight lows between 44° and 58°. The average high for September is 75° 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.
