S
M
T
W
T
F
S
26
102°
76°
27
102°
77°
28
101°
76°
29
102°
77°
30
103°
78°
31
104°
77°
1
102°
76°
2
101°
76°
3
102°
75°
4
102°
77°
5
101°
77°
6
102°
76°
7
102°
77°
8
101°
77°
9
102°
76°
10
99°
74°
11
100°
75°
12
100°
74°
13
99°
75°
14
99°
72°
15
100°
73°
16
100°
72°
17
98°
73°
18
99°
71°
19
98°
68°
20
93°
66°
21
92°
65°
22
91°
66°
23
92°
67°
24
98°
69°
25
98°
70°
26
97°
71°
27
98°
69°
28
98°
71°
29
97°
70°
30
97°
70°
31
96°
69°
1
96°
65°
2
95°
63°
3
93°
67°
4
95°
70°
5
95°
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 91° to 104°, with overnight lows between 63° and 78°. The average high for August is 99° with an average low of 72°. 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.
