S
M
T
W
T
F
S
30
91°
73°
31
92°
74°
1
89°
74°
2
91°
76°
3
92°
76°
4
92°
75°
5
93°
76°
6
91°
74°
7
89°
75°
8
89°
75°
9
92°
75°
10
N/A
11
92°
76°
12
92°
75°
13
92°
74°
14
92°
75°
15
91°
74°
16
89°
72°
17
89°
74°
18
90°
75°
19
87°
72°
20
88°
74°
21
85°
73°
22
89°
68°
23
87°
68°
24
85°
66°
25
90°
74°
26
89°
74°
27
88°
73°
28
88°
73°
29
89°
72°
30
89°
73°
1
90°
73°
2
90°
72°
3
88°
73°
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 85° to 92°, with overnight lows between 66° and 76°. The average high for September is 89° with an average low of 73°. 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.
