S
M
T
W
T
F
S
26
94°
78°
27
94°
78°
28
97°
77°
29
92°
78°
30
87°
71°
31
92°
67°
1
90°
72°
2
84°
72°
3
86°
72°
4
92°
72°
5
93°
71°
6
90°
71°
7
91°
70°
8
91°
68°
9
91°
72°
10
95°
73°
11
95°
71°
12
94°
69°
13
97°
75°
14
97°
75°
15
98°
74°
16
99°
75°
17
99°
74°
18
93°
72°
19
95°
73°
20
93°
72°
21
92°
69°
22
94°
71°
23
94°
71°
24
92°
70°
25
90°
70°
26
91°
69°
27
91°
72°
28
90°
70°
29
89°
71°
30
90°
72°
31
91°
71°
1
90°
71°
2
90°
70°
3
89°
71°
4
90°
71°
5
90°
70°
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 89° to 99°, with overnight lows between 69° and 75°. The average high for August is 92° with an average low of 71°. 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.
