S
M
T
W
T
F
S
30
88°
67°
31
89°
64°
1
88°
62°
2
82°
63°
3
85°
66°
4
87°
64°
5
85°
64°
6
86°
66°
7
87°
65°
8
86°
64°
9
86°
64°
10
80°
65°
11
85°
64°
12
84°
59°
13
79°
60°
14
79°
63°
15
80°
62°
16
83°
59°
17
81°
59°
18
81°
56°
19
78°
58°
20
78°
60°
21
76°
55°
22
77°
55°
23
81°
56°
24
80°
59°
25
81°
60°
26
80°
58°
27
81°
54°
28
75°
53°
29
79°
52°
30
75°
52°
1
Hist. Avg.
78°
54°
2
Hist. Avg.
78°
53°
3
Hist. Avg.
77°
53°
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 75° to 89°, with overnight lows between 52° and 67°. 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 Cornelius. See also: October | November | December.
