S
M
T
W
T
F
S
30
99°
64°
31
100°
68°
1
101°
72°
2
100°
72°
3
100°
73°
4
101°
74°
5
103°
73°
6
103°
75°
7
100°
73°
8
101°
73°
9
101°
74°
10
94°
70°
11
94°
72°
12
96°
69°
13
99°
72°
14
98°
70°
15
92°
69°
16
88°
66°
17
89°
67°
18
92°
64°
19
86°
63°
20
84°
60°
21
90°
66°
22
89°
65°
23
89°
65°
24
88°
64°
25
88°
66°
26
87°
65°
27
87°
64°
28
86°
64°
29
86°
63°
30
85°
62°
1
82°
54°
2
73°
51°
3
74°
51°
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 73° to 101°, with overnight lows between 51° and 74°. The average high for September is 89° with an average low of 65°. 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.
