S
M
T
W
T
F
S
26
74°
54°
27
76°
57°
28
59°
47°
29
60°
43°
30
66°
40°
1
65°
39°
2
63°
40°
3
81°
49°
4
81°
57°
5
59°
46°
6
60°
45°
7
68°
43°
8
67°
54°
9
83°
53°
10
68°
53°
11
78°
48°
12
80°
58°
13
77°
51°
14
77°
63°
15
86°
68°
16
83°
68°
17
85°
71°
18
88°
61°
19
74°
52°
20
72°
53°
21
76°
52°
22
80°
56°
23
76°
60°
24
81°
63°
25
77°
62°
26
82°
63°
27
78°
59°
28
81°
62°
29
82°
60°
30
74°
58°
31
75°
60°
1
73°
56°
2
74°
59°
3
75°
66°
4
84°
67°
5
84°
67°
6
81°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grain Valley
Grain Valley's May 2026 forecast shows daily high temperatures ranging from 72° to 88°, with overnight lows between 52° and 71°. 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 Grain Valley. See also: June | July | August.
