S
M
T
W
T
F
S
30
65°
51°
31
65°
50°
1
66°
52°
2
64°
52°
3
64°
50°
4
65°
49°
5
64°
49°
6
65°
50°
7
67°
51°
8
66°
54°
9
67°
53°
10
63°
54°
11
65°
54°
12
63°
53°
13
67°
54°
14
66°
53°
15
67°
51°
16
65°
50°
17
61°
51°
18
61°
48°
19
63°
47°
20
60°
47°
21
61°
46°
22
60°
48°
23
61°
47°
24
60°
49°
25
60°
52°
26
61°
52°
27
63°
50°
28
62°
48°
29
59°
48°
30
59°
46°
1
60°
46°
2
58°
45°
3
58°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seaton Delaval
Seaton Delaval's September 2026 forecast shows daily high temperatures ranging from 58° to 67°, with overnight lows between 45° and 54°. The average high for September is 63° with an average low of 50°. 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 Seaton Delaval. See also: October | November | December.
