S
M
T
W
T
F
S
30
84°
59°
31
76°
55°
1
76°
54°
2
75°
53°
3
76°
56°
4
83°
61°
5
82°
62°
6
80°
62°
7
81°
58°
8
82°
59°
9
81°
60°
10
83°
58°
11
84°
59°
12
80°
60°
13
83°
58°
14
84°
49°
15
80°
46°
16
71°
47°
17
71°
48°
18
72°
54°
19
75°
56°
20
75°
56°
21
73°
54°
22
77°
51°
23
78°
53°
24
79°
54°
25
80°
54°
26
80°
55°
27
79°
46°
28
78°
41°
29
69°
46°
30
67°
47°
1
65°
46°
2
67°
50°
3
65°
44°
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 84°, with overnight lows between 41° and 62°. The average high for September is 77° 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.
