S
M
T
W
T
F
S
30
89°
63°
31
90°
67°
1
93°
69°
2
95°
70°
3
94°
68°
4
88°
68°
5
84°
63°
6
82°
63°
7
82°
61°
8
81°
60°
9
80°
59°
10
83°
59°
11
80°
56°
12
78°
57°
13
80°
58°
14
79°
55°
15
81°
60°
16
79°
60°
17
82°
59°
18
80°
59°
19
82°
60°
20
82°
60°
21
81°
59°
22
82°
59°
23
82°
58°
24
81°
59°
25
82°
58°
26
81°
57°
27
80°
58°
28
80°
57°
29
79°
56°
30
79°
56°
1
78°
55°
2
78°
55°
3
77°
54°
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 77° to 95°, with overnight lows between 54° and 70°. The average high for September is 82° 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.
