S
M
T
W
T
F
S
26
84°
65°
27
79°
64°
28
79°
60°
29
80°
63°
30
82°
66°
31
84°
66°
1
82°
65°
2
82°
64°
3
86°
61°
4
80°
58°
5
80°
60°
6
81°
59°
7
80°
58°
8
79°
57°
9
79°
56°
10
80°
58°
11
81°
64°
12
85°
65°
13
85°
59°
14
82°
57°
15
79°
61°
16
80°
63°
17
82°
57°
18
79°
59°
19
79°
57°
20
80°
57°
21
81°
60°
22
84°
63°
23
85°
63°
24
86°
62°
25
85°
62°
26
86°
61°
27
85°
62°
28
84°
61°
29
84°
61°
30
81°
55°
31
78°
52°
1
77°
52°
2
76°
54°
3
77°
55°
4
77°
53°
5
78°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Knox
Knox's August 2026 forecast shows daily high temperatures ranging from 76° to 86°, with overnight lows between 52° and 66°. The average high for August is 81° 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 August weather will actually feel in Knox. See also: September | October | November.
