S
M
T
W
T
F
S
30
84°
57°
31
80°
56°
1
78°
58°
2
80°
61°
3
79°
57°
4
79°
55°
5
81°
57°
6
80°
60°
7
79°
54°
8
78°
55°
9
76°
60°
10
81°
54°
11
77°
53°
12
76°
52°
13
76°
57°
14
80°
58°
15
82°
58°
16
82°
57°
17
81°
58°
18
82°
57°
19
81°
50°
20
74°
49°
21
72°
53°
22
73°
55°
23
77°
55°
24
78°
56°
25
79°
51°
26
78°
47°
27
74°
48°
28
70°
47°
29
70°
47°
30
70°
52°
1
70°
46°
2
69°
44°
3
Hist. Avg.
72°
47°
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 69° to 84°, with overnight lows between 44° and 61°. The average high for September is 77° with an average low of 54°. 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.
