S
M
T
W
T
F
S
26
95°
67°
27
89°
62°
28
92°
62°
29
76°
55°
30
61°
52°
1
56°
47°
2
66°
46°
3
76°
51°
4
86°
56°
5
79°
64°
6
76°
49°
7
77°
51°
8
88°
54°
9
94°
59°
10
81°
57°
11
81°
53°
12
95°
57°
13
97°
58°
14
98°
60°
15
95°
69°
16
98°
66°
17
95°
65°
18
95°
68°
19
81°
55°
20
65°
55°
21
75°
60°
22
92°
59°
23
91°
57°
24
89°
58°
25
89°
60°
26
72°
60°
27
85°
58°
28
90°
63°
29
89°
69°
30
93°
71°
31
96°
62°
1
94°
65°
2
91°
64°
3
81°
61°
4
87°
62°
5
82°
66°
6
83°
62°
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 83° to 83°, with overnight lows between 62° and 62°. The average high for May is 83° with an average low of 62°. 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.