S
M
T
W
T
F
S
26
87°
73°
27
87°
73°
28
88°
72°
29
87°
73°
30
87°
71°
31
89°
68°
1
87°
69°
2
87°
73°
3
88°
73°
4
87°
72°
5
89°
73°
6
91°
74°
7
90°
74°
8
88°
73°
9
89°
72°
10
89°
69°
11
89°
73°
12
92°
73°
13
87°
72°
14
88°
71°
15
91°
72°
16
91°
71°
17
90°
70°
18
89°
68°
19
88°
66°
20
85°
66°
21
85°
67°
22
86°
66°
23
86°
65°
24
87°
65°
25
86°
66°
26
86°
65°
27
87°
65°
28
87°
66°
29
88°
65°
30
86°
65°
31
90°
66°
1
89°
68°
2
90°
69°
3
89°
65°
4
84°
64°
5
87°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chattanooga
Chattanooga's August 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 64° and 74°. The average high for August is 88° with an average low of 69°. 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 Chattanooga. See also: September | October | November.
