S
M
T
W
T
F
S
30
78°
60°
31
76°
60°
1
75°
66°
2
75°
67°
3
82°
66°
4
83°
67°
5
82°
64°
6
78°
59°
7
77°
61°
8
76°
58°
9
74°
57°
10
73°
57°
11
73°
58°
12
75°
57°
13
75°
63°
14
78°
62°
15
73°
56°
16
72°
59°
17
71°
58°
18
72°
61°
19
74°
54°
20
73°
56°
21
72°
55°
22
76°
53°
23
70°
53°
24
69°
52°
25
69°
56°
26
71°
57°
27
71°
58°
28
73°
58°
29
74°
50°
30
67°
53°
1
67°
58°
2
73°
57°
3
71°
50°
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 67° to 83°, with overnight lows between 50° and 67°. The average high for September is 74° with an average low of 58°. 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.
