S
M
T
W
T
F
S
26
90°
72°
27
91°
71°
28
91°
70°
29
90°
71°
30
91°
72°
31
90°
72°
1
89°
71°
2
90°
71°
3
87°
70°
4
90°
71°
5
90°
71°
6
89°
70°
7
86°
70°
8
86°
68°
9
89°
70°
10
90°
71°
11
90°
70°
12
87°
70°
13
86°
69°
14
89°
66°
15
88°
69°
16
90°
67°
17
88°
68°
18
85°
69°
19
86°
68°
20
85°
66°
21
85°
64°
22
83°
62°
23
84°
63°
24
84°
63°
25
87°
64°
26
88°
67°
27
88°
66°
28
89°
67°
29
89°
68°
30
88°
67°
31
89°
64°
1
88°
62°
2
82°
63°
3
85°
66°
4
87°
64°
5
85°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cornelius
Cornelius's August 2026 forecast shows daily high temperatures ranging from 82° to 91°, with overnight lows between 62° and 72°. The average high for August is 88° with an average low of 68°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Cornelius. See also: September | October | November.