S
M
T
W
T
F
S
30
83°
67°
31
88°
66°
1
86°
64°
2
85°
63°
3
84°
62°
4
83°
64°
5
84°
63°
6
86°
64°
7
80°
67°
8
80°
67°
9
81°
66°
10
83°
64°
11
81°
61°
12
80°
62°
13
81°
64°
14
79°
64°
15
78°
63°
16
77°
59°
17
79°
63°
18
83°
63°
19
84°
60°
20
76°
59°
21
80°
62°
22
82°
61°
23
82°
61°
24
81°
55°
25
75°
55°
26
79°
60°
27
76°
60°
28
75°
58°
29
76°
59°
30
74°
57°
1
73°
55°
2
79°
50°
3
73°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cornelius
Cornelius's September 2026 forecast shows daily high temperatures ranging from 73° to 88°, with overnight lows between 50° and 67°. The average high for September is 80° with an average low of 61°. 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 Cornelius. See also: October | November | December.
