S
M
T
W
T
F
S
26
84°
69°
27
84°
63°
28
84°
63°
29
85°
65°
30
86°
66°
31
88°
67°
1
89°
65°
2
84°
65°
3
85°
64°
4
83°
63°
5
84°
65°
6
84°
66°
7
85°
66°
8
83°
67°
9
84°
70°
10
84°
70°
11
85°
65°
12
84°
67°
13
90°
69°
14
90°
63°
15
84°
63°
16
84°
65°
17
86°
66°
18
89°
64°
19
84°
65°
20
82°
63°
21
83°
62°
22
83°
65°
23
84°
63°
24
82°
66°
25
82°
68°
26
83°
68°
27
88°
67°
28
89°
68°
29
89°
64°
30
88°
61°
31
81°
61°
1
83°
64°
2
86°
66°
3
85°
65°
4
85°
66°
5
86°
65°
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 90°, with overnight lows between 61° and 70°. The average high for August is 85° with an average low of 65°. 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.
