S
M
T
W
T
F
S
30
82°
66°
31
82°
66°
1
81°
64°
2
82°
65°
3
82°
67°
4
80°
65°
5
82°
62°
6
82°
56°
7
76°
57°
8
74°
58°
9
75°
60°
10
78°
63°
11
81°
61°
12
82°
62°
13
80°
65°
14
81°
64°
15
81°
59°
16
79°
60°
17
80°
62°
18
79°
63°
19
81°
61°
20
80°
58°
21
78°
62°
22
74°
62°
23
72°
58°
24
75°
63°
25
75°
60°
26
77°
57°
27
75°
57°
28
74°
60°
29
74°
56°
30
73°
60°
1
73°
64°
2
80°
62°
3
75°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Wilmington
Wilmington's September 2026 forecast shows daily high temperatures ranging from 72° to 82°, with overnight lows between 56° and 67°. The average high for September is 78° with an average low of 61°. 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 Wilmington. See also: October | November | December.
