S
M
T
W
T
F
S
26
85°
66°
27
82°
61°
28
81°
60°
29
82°
64°
30
85°
65°
31
82°
63°
1
87°
66°
2
87°
62°
3
82°
61°
4
81°
60°
5
82°
61°
6
82°
62°
7
83°
61°
8
80°
60°
9
84°
65°
10
87°
64°
11
81°
66°
12
86°
66°
13
87°
65°
14
84°
66°
15
86°
65°
16
87°
59°
17
80°
60°
18
81°
64°
19
80°
60°
20
80°
57°
21
78°
58°
22
80°
58°
23
86°
61°
24
87°
64°
25
88°
63°
26
87°
57°
27
80°
56°
28
79°
56°
29
79°
57°
30
84°
61°
31
84°
62°
1
85°
62°
2
85°
60°
3
79°
59°
4
84°
62°
5
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Carnegie
Carnegie's August 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 56° and 66°. The average high for August is 83° with an average low of 62°. 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 Carnegie. See also: September | October | November.