S
M
T
W
T
F
S
30
81°
69°
31
82°
71°
1
85°
71°
2
86°
70°
3
86°
70°
4
85°
65°
5
80°
65°
6
79°
66°
7
81°
67°
8
82°
70°
9
83°
68°
10
81°
69°
11
84°
68°
12
84°
69°
13
83°
69°
14
83°
68°
15
84°
69°
16
83°
69°
17
83°
68°
18
82°
66°
19
82°
63°
20
81°
60°
21
76°
61°
22
74°
65°
23
76°
63°
24
81°
59°
25
74°
59°
26
75°
61°
27
74°
60°
28
78°
61°
29
77°
62°
30
78°
62°
1
77°
63°
2
77°
62°
3
71°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Seaford
Seaford's September 2026 forecast shows daily high temperatures ranging from 71° to 86°, with overnight lows between 59° and 71°. The average high for September is 80° 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 Seaford. See also: October | November | December.
