S
M
T
W
T
F
S
26
83°
64°
27
85°
65°
28
84°
63°
29
81°
61°
30
80°
67°
31
87°
67°
1
82°
63°
2
80°
61°
3
81°
66°
4
85°
67°
5
83°
66°
6
81°
66°
7
81°
64°
8
80°
60°
9
80°
62°
10
81°
65°
11
80°
63°
12
79°
59°
13
81°
65°
14
85°
66°
15
81°
65°
16
80°
60°
17
79°
59°
18
82°
65°
19
80°
65°
20
81°
63°
21
79°
65°
22
78°
65°
23
78°
64°
24
79°
65°
25
79°
65°
26
81°
64°
27
83°
65°
28
85°
63°
29
85°
59°
30
84°
61°
31
85°
62°
1
85°
62°
2
84°
61°
3
84°
62°
4
82°
61°
5
79°
60°
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 87°, with overnight lows between 59° and 67°. The average high for August is 82° with an average low of 63°. 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.