S
M
T
W
T
F
S
26
86°
70°
27
88°
70°
28
88°
71°
29
87°
71°
30
89°
70°
31
88°
71°
1
89°
71°
2
90°
72°
3
90°
72°
4
90°
71°
5
90°
72°
6
91°
72°
7
91°
71°
8
90°
70°
9
84°
66°
10
84°
67°
11
88°
71°
12
89°
71°
13
90°
72°
14
90°
71°
15
89°
70°
16
87°
68°
17
88°
64°
18
87°
63°
19
86°
63°
20
88°
67°
21
89°
68°
22
88°
67°
23
87°
67°
24
83°
65°
25
82°
64°
26
81°
65°
27
81°
61°
28
82°
62°
29
81°
61°
30
81°
63°
31
86°
65°
1
87°
66°
2
86°
65°
3
86°
66°
4
85°
59°
5
81°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Mammoth Cave
Mammoth Cave's August 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 59° and 72°. The average high for August is 87° with an average low of 68°. 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 Mammoth Cave. See also: September | October | November.
