S
M
T
W
T
F
S
26
96°
72°
27
96°
68°
28
100°
69°
29
70°
57°
30
60°
54°
1
63°
52°
2
74°
46°
3
79°
50°
4
93°
70°
5
94°
55°
6
74°
47°
7
74°
53°
8
94°
64°
9
93°
67°
10
88°
58°
11
84°
63°
12
92°
66°
13
96°
68°
14
91°
63°
15
91°
66°
16
93°
65°
17
85°
60°
18
80°
63°
19
81°
64°
20
81°
64°
21
85°
59°
22
79°
57°
23
80°
62°
24
87°
61°
25
82°
58°
26
81°
58°
27
82°
59°
28
83°
63°
29
82°
66°
30
83°
65°
31
84°
66°
1
84°
66°
2
85°
67°
3
87°
69°
4
89°
69°
5
85°
68°
6
85°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plainview
Plainview's May 2026 forecast shows daily high temperatures ranging from 74° to 96°, with overnight lows between 47° and 70°. The average high for May is 86° with an average low of 63°. 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 Plainview. See also: June | July | August.