S
M
T
W
T
F
S
26
34°
25°
27
34°
27°
28
32°
23°
29
36°
27°
30
32°
23°
1
36°
23°
2
46°
27°
3
46°
32°
4
41°
30°
5
41°
27°
6
28°
21°
7
43°
23°
8
54°
34°
9
52°
36°
10
52°
32°
11
61°
39°
12
68°
45°
13
64°
41°
14
63°
41°
15
63°
39°
16
59°
37°
17
43°
28°
18
32°
25°
19
36°
23°
20
45°
27°
21
52°
28°
22
43°
27°
23
55°
30°
24
57°
39°
25
55°
41°
26
48°
36°
27
59°
36°
28
68°
41°
29
61°
34°
30
45°
30°
31
54°
32°
1
64°
41°
2
68°
46°
3
61°
45°
4
70°
46°
5
70°
48°
6
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Mesa
Grand Mesa's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Mesa. See also: June | July | August.