S
M
T
W
T
F
S
26
97°
75°
27
93°
79°
28
88°
73°
29
86°
72°
30
84°
68°
31
81°
64°
1
81°
64°
2
82°
64°
3
84°
64°
4
79°
66°
5
72°
66°
6
82°
68°
7
86°
64°
8
81°
63°
9
90°
72°
10
88°
73°
11
91°
75°
12
88°
73°
13
84°
70°
14
77°
72°
15
86°
73°
16
77°
66°
17
81°
63°
18
82°
66°
19
80°
61°
20
81°
65°
21
85°
63°
22
83°
59°
23
76°
62°
24
79°
62°
25
80°
62°
26
79°
61°
27
80°
60°
28
80°
64°
29
81°
63°
30
80°
61°
31
81°
60°
1
75°
64°
2
75°
60°
3
73°
55°
4
74°
58°
5
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Knoxville
Knoxville's August 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 55° and 66°. The average high for August is 79° with an average low of 61°. 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 Knoxville. See also: September | October | November.
