S
M
T
W
T
F
S
26
70°
43°
27
61°
45°
28
55°
37°
29
57°
37°
30
52°
39°
1
52°
37°
2
64°
34°
3
72°
48°
4
72°
48°
5
55°
37°
6
55°
32°
7
64°
41°
8
77°
43°
9
66°
43°
10
68°
39°
11
77°
41°
12
79°
57°
13
77°
46°
14
79°
50°
15
91°
54°
16
79°
54°
17
81°
59°
18
61°
50°
19
54°
45°
20
57°
39°
21
61°
48°
22
63°
48°
23
72°
48°
24
82°
52°
25
88°
59°
26
90°
64°
27
90°
61°
28
90°
66°
29
76°
62°
30
73°
60°
31
77°
61°
1
83°
60°
2
83°
61°
3
81°
62°
4
79°
62°
5
79°
60°
6
81°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Alta
Alta's May 2026 forecast shows daily high temperatures ranging from 73° to 83°, with overnight lows between 58° and 62°. The average high for May is 79° with an average low of 61°. 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 Alta. See also: June | July | August.
