S
M
T
W
T
F
S
26
47°
36°
27
59°
26°
28
63°
18°
29
66°
23°
30
66°
24°
1
65°
29°
2
69°
22°
3
71°
29°
4
63°
41°
5
58°
24°
6
67°
22°
7
73°
29°
8
79°
31°
9
82°
32°
10
81°
33°
11
84°
33°
12
87°
35°
13
81°
36°
14
77°
27°
15
87°
57°
16
81°
53°
17
79°
40°
18
72°
44°
19
79°
48°
20
85°
48°
21
87°
49°
22
86°
51°
23
80°
48°
24
82°
48°
25
79°
47°
26
80°
48°
27
84°
49°
28
85°
48°
29
79°
51°
30
85°
52°
31
88°
53°
1
90°
54°
2
90°
55°
3
91°
56°
4
90°
56°
5
87°
55°
6
88°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Canyon Caverns
Grand Canyon Caverns's May 2026 forecast shows daily high temperatures ranging from 72° to 91°, with overnight lows between 40° and 57°. The average high for May is 84° with an average low of 51°. 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 Grand Canyon Caverns. See also: June | July | August.
