S
M
T
W
T
F
S
26
79°
50°
27
83°
52°
28
79°
59°
29
68°
55°
30
63°
41°
1
63°
38°
2
60°
37°
3
65°
33°
4
80°
51°
5
75°
59°
6
64°
50°
7
64°
41°
8
72°
37°
9
76°
53°
10
77°
50°
11
73°
47°
12
77°
43°
13
78°
50°
14
67°
44°
15
77°
40°
16
84°
63°
17
88°
60°
18
90°
66°
19
90°
65°
20
75°
61°
21
72°
63°
22
77°
66°
23
76°
65°
24
77°
66°
25
78°
68°
26
76°
66°
27
77°
65°
28
78°
63°
29
77°
64°
30
76°
65°
31
79°
63°
1
80°
61°
2
83°
65°
3
80°
63°
4
76°
59°
5
76°
58°
6
81°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mammoth Cave
Mammoth Cave's May 2026 forecast shows daily high temperatures ranging from 72° to 90°, with overnight lows between 58° and 68°. The average high for May is 78° with an average low of 64°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Mammoth Cave. See also: June | July | August.
