S
M
T
W
T
F
S
30
85°
60°
31
85°
70°
1
93°
71°
2
79°
72°
3
91°
72°
4
88°
65°
5
82°
63°
6
79°
59°
7
76°
63°
8
78°
64°
9
82°
69°
10
85°
64°
11
80°
61°
12
77°
63°
13
77°
64°
14
78°
63°
15
74°
59°
16
72°
62°
17
72°
57°
18
70°
55°
19
75°
58°
20
77°
60°
21
76°
61°
22
75°
60°
23
71°
60°
24
74°
58°
25
72°
58°
26
75°
60°
27
75°
59°
28
72°
54°
29
65°
52°
30
67°
55°
1
66°
52°
2
65°
54°
3
63°
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 63° to 91°, with overnight lows between 50° and 72°. The average high for September is 75° with an average low of 60°. 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.
