S
M
T
W
T
F
S
26
67°
28°
27
70°
30°
28
60°
44°
29
50°
36°
30
50°
27°
1
49°
26°
2
46°
25°
3
55°
22°
4
74°
42°
5
59°
34°
6
51°
29°
7
45°
28°
8
51°
29°
9
58°
41°
10
56°
33°
11
51°
31°
12
51°
35°
13
52°
38°
14
59°
36°
15
59°
40°
16
58°
38°
17
60°
39°
18
59°
42°
19
64°
40°
20
57°
36°
21
58°
37°
22
58°
37°
23
60°
39°
24
64°
41°
25
66°
44°
26
66°
43°
27
61°
42°
28
68°
43°
29
65°
44°
30
69°
46°
31
71°
48°
1
72°
46°
2
68°
45°
3
70°
48°
4
73°
49°
5
73°
50°
6
71°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grandview
Grandview's May 2026 forecast shows daily high temperatures ranging from 45° to 73°, with overnight lows between 28° and 50°. The average high for May is 61° with an average low of 40°. 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 Grandview. See also: June | July | August.