S
M
T
W
T
F
S
26
68°
29°
27
69°
37°
28
67°
39°
29
74°
40°
30
77°
38°
1
78°
38°
2
82°
53°
3
88°
43°
4
88°
50°
5
85°
53°
6
83°
53°
7
81°
48°
8
73°
47°
9
77°
46°
10
76°
46°
11
78°
46°
12
84°
47°
13
61°
51°
14
64°
47°
15
60°
43°
16
61°
39°
17
70°
38°
18
73°
42°
19
62°
46°
20
73°
45°
21
75°
47°
22
78°
51°
23
76°
51°
24
71°
41°
25
62°
38°
26
66°
41°
27
70°
43°
28
73°
44°
29
69°
41°
30
71°
45°
31
75°
47°
1
70°
43°
2
75°
48°
3
76°
47°
4
74°
46°
5
71°
42°
6
74°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plain
Plain's May 2026 forecast shows daily high temperatures ranging from 62° to 78°, with overnight lows between 38° and 51°. The average high for May is 72° with an average low of 45°. 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 Plain. See also: June | July | August.
