S
M
T
W
T
F
S
26
75°
63°
27
79°
57°
28
84°
57°
29
88°
59°
30
91°
63°
1
93°
73°
2
93°
73°
3
95°
66°
4
82°
72°
5
79°
63°
6
90°
61°
7
99°
66°
8
104°
70°
9
106°
75°
10
108°
75°
11
108°
77°
12
108°
79°
13
99°
75°
14
99°
73°
15
100°
73°
16
97°
75°
17
93°
72°
18
81°
64°
19
86°
66°
20
93°
70°
21
97°
64°
22
99°
72°
23
82°
64°
24
85°
65°
25
87°
67°
26
85°
59°
27
77°
56°
28
76°
55°
29
82°
60°
30
88°
65°
31
90°
67°
1
91°
67°
2
92°
66°
3
93°
68°
4
94°
67°
5
89°
63°
6
85°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Cal-Nev-Ari
Cal-Nev-Ari's May 2026 forecast shows daily high temperatures ranging from 76° to 94°, with overnight lows between 55° and 68°. The average high for May is 86° with an average low of 63°. 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 Cal-Nev-Ari. See also: June | July | August.