S
M
T
W
T
F
S
26
87°
69°
27
84°
69°
28
84°
68°
29
85°
69°
30
84°
70°
31
87°
70°
1
86°
69°
2
85°
70°
3
91°
68°
4
85°
64°
5
85°
67°
6
86°
65°
7
85°
63°
8
86°
62°
9
85°
62°
10
85°
63°
11
87°
69°
12
90°
70°
13
91°
68°
14
90°
65°
15
85°
68°
16
84°
69°
17
87°
62°
18
85°
64°
19
84°
62°
20
85°
62°
21
87°
66°
22
89°
68°
23
90°
66°
24
90°
67°
25
91°
66°
26
89°
67°
27
90°
66°
28
89°
67°
29
89°
67°
30
86°
61°
31
85°
58°
1
82°
58°
2
81°
59°
3
82°
59°
4
82°
60°
5
88°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fort Knox
Fort Knox's August 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 58° and 70°. The average high for August is 86° with an average low of 65°. 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 Fort Knox. See also: September | October | November.