S
M
T
W
T
F
S
26
61°
38°
27
70°
38°
28
65°
47°
29
71°
47°
30
62°
41°
1
67°
47°
2
64°
45°
3
61°
44°
4
74°
54°
5
85°
63°
6
71°
50°
7
67°
41°
8
67°
51°
9
68°
48°
10
79°
50°
11
63°
42°
12
69°
49°
13
77°
52°
14
67°
49°
15
70°
49°
16
82°
63°
17
90°
62°
18
84°
64°
19
95°
68°
20
91°
60°
21
74°
50°
22
70°
52°
23
74°
55°
24
77°
57°
25
79°
59°
26
81°
63°
27
83°
53°
28
72°
51°
29
72°
53°
30
73°
59°
31
80°
56°
1
73°
54°
2
74°
54°
3
73°
53°
4
74°
53°
5
75°
60°
6
80°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Plainfield
South Plainfield's May 2026 forecast shows daily high temperatures ranging from 67° to 95°, with overnight lows between 49° and 68°. The average high for May is 78° with an average low of 57°. 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 South Plainfield. See also: June | July | August.
