S
M
T
W
T
F
S
26
64°
45°
27
75°
42°
28
74°
54°
29
57°
46°
30
54°
41°
1
48°
35°
2
44°
33°
3
60°
33°
4
71°
46°
5
71°
57°
6
58°
44°
7
60°
36°
8
64°
42°
9
69°
51°
10
64°
47°
11
64°
39°
12
69°
41°
13
67°
46°
14
60°
44°
15
69°
35°
16
73°
50°
17
83°
59°
18
89°
62°
19
88°
63°
20
66°
48°
21
65°
48°
22
59°
50°
23
74°
56°
24
71°
61°
25
75°
61°
26
79°
54°
27
74°
61°
28
75°
53°
29
77°
48°
30
71°
52°
31
75°
47°
1
74°
51°
2
75°
47°
3
78°
45°
4
82°
49°
5
83°
54°
6
80°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plainfield
Plainfield's May 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for May is ° with an average low of °. 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 Plainfield. See also: June | July | August.