S
M
T
W
T
F
S
26
65°
50°
27
66°
49°
28
76°
43°
29
81°
47°
30
86°
50°
1
88°
57°
2
92°
53°
3
81°
51°
4
68°
52°
5
71°
51°
6
82°
52°
7
89°
55°
8
91°
54°
9
90°
55°
10
94°
58°
11
89°
56°
12
92°
59°
13
94°
59°
14
82°
52°
15
76°
49°
16
77°
51°
17
79°
50°
18
78°
52°
19
78°
49°
20
79°
52°
21
86°
57°
22
87°
57°
23
88°
58°
24
88°
58°
25
87°
57°
26
88°
58°
27
87°
57°
28
88°
55°
29
88°
54°
30
84°
52°
31
83°
53°
1
83°
54°
2
86°
57°
3
90°
58°
4
90°
59°
5
89°
59°
6
87°
58°
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 68° to 94°, with overnight lows between 49° and 59°. The average high for May is 85° with an average low of 55°. 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.