S
M
T
W
T
F
S
26
30°
19°
27
42°
18°
28
50°
23°
29
58°
29°
30
68°
33°
1
62°
43°
2
67°
32°
3
59°
41°
4
47°
33°
5
50°
22°
6
63°
32°
7
67°
46°
8
63°
39°
9
63°
39°
10
71°
46°
11
64°
47°
12
69°
43°
13
71°
46°
14
58°
44°
15
48°
36°
16
47°
33°
17
52°
31°
18
59°
34°
19
62°
40°
20
62°
38°
21
68°
48°
22
68°
44°
23
72°
46°
24
70°
49°
25
67°
46°
26
77°
54°
27
71°
51°
28
74°
52°
29
71°
48°
30
68°
44°
31
74°
54°
1
78°
52°
2
70°
50°
3
71°
50°
4
68°
49°
5
62°
49°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grassland
Grassland's May 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 38° and 54°. The average high for May is 69° with an average low of 48°. 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 Grassland. See also: June | July | August.
