S
M
T
W
T
F
S
30
80°
67°
31
94°
71°
1
95°
73°
2
96°
72°
3
94°
74°
4
94°
74°
5
88°
72°
6
82°
63°
7
82°
59°
8
87°
71°
9
80°
65°
10
80°
55°
11
81°
62°
12
83°
64°
13
78°
64°
14
80°
62°
15
76°
56°
16
73°
53°
17
69°
49°
18
71°
52°
19
71°
48°
20
70°
51°
21
75°
52°
22
70°
57°
23
72°
56°
24
78°
57°
25
79°
57°
26
79°
56°
27
78°
57°
28
79°
58°
29
79°
58°
30
78°
57°
1
75°
52°
2
71°
46°
3
64°
42°
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 64° to 87°, with overnight lows between 42° and 71°. The average high for September is 76° with an average low of 56°. 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.
