S
M
T
W
T
F
S
26
59°
31°
27
61°
34°
28
62°
32°
29
64°
35°
30
68°
36°
1
69°
34°
2
64°
32°
3
58°
34°
4
58°
33°
5
62°
38°
6
60°
32°
7
58°
34°
8
57°
32°
9
61°
39°
10
61°
34°
11
62°
36°
12
62°
34°
13
68°
39°
14
71°
41°
15
69°
40°
16
63°
34°
17
62°
34°
18
67°
41°
19
74°
42°
20
75°
43°
21
75°
43°
22
76°
42°
23
74°
42°
24
72°
41°
25
74°
43°
26
74°
43°
27
73°
42°
28
68°
38°
29
68°
39°
30
72°
44°
31
78°
45°
1
77°
36°
2
77°
41°
3
81°
42°
4
83°
43°
5
82°
45°
6
83°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Canyon National Park
Grand Canyon National Park's May 2026 forecast shows daily high temperatures ranging from 57° to 83°, with overnight lows between 31° and 45°. The average high for May is 69° with an average low of 38°. 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 National Park. See also: June | July | August.
