S
M
T
W
T
F
S
26
64°
30°
27
63°
39°
28
54°
39°
29
45°
32°
30
39°
28°
1
39°
27°
2
50°
34°
3
57°
40°
4
62°
34°
5
47°
28°
6
45°
28°
7
45°
29°
8
49°
31°
9
51°
32°
10
52°
33°
11
53°
34°
12
54°
36°
13
56°
38°
14
55°
39°
15
56°
40°
16
60°
46°
17
62°
45°
18
58°
44°
19
60°
48°
20
63°
47°
21
61°
39°
22
57°
39°
23
59°
43°
24
58°
40°
25
59°
40°
26
59°
41°
27
60°
41°
28
60°
42°
29
62°
48°
30
64°
49°
31
63°
48°
1
64°
46°
2
65°
53°
3
70°
53°
4
66°
52°
5
71°
54°
6
71°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plains
Plains's May 2026 forecast shows daily high temperatures ranging from 45° to 71°, with overnight lows between 28° and 54°. The average high for May is 58° with an average low of 41°. 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 Plains. See also: June | July | August.
