S
M
T
W
T
F
S
30
73°
63°
31
72°
59°
1
72°
57°
2
70°
63°
3
79°
66°
4
70°
59°
5
73°
55°
6
81°
59°
7
77°
64°
8
64°
57°
9
66°
54°
10
70°
57°
11
70°
61°
12
73°
57°
13
73°
64°
14
77°
64°
15
73°
61°
16
N/A
17
71°
49°
18
69°
62°
19
72°
60°
20
71°
54°
21
73°
58°
22
72°
55°
23
72°
55°
24
73°
54°
25
71°
54°
26
69°
52°
27
68°
53°
28
69°
55°
29
66°
48°
30
67°
49°
1
68°
48°
2
67°
47°
3
65°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Wilmington
Wilmington's September 2026 forecast shows daily high temperatures ranging from 65° to 73°, with overnight lows between 42° and 62°. The average high for September is 70° with an average low of 53°. 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.
