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
69°
49°
15
69°
45°
16
83°
59°
17
90°
61°
18
95°
72°
19
97°
70°
20
95°
59°
21
63°
53°
22
68°
53°
23
56°
51°
24
63°
53°
25
76°
55°
26
85°
63°
27
N/A
28
76°
53°
29
79°
54°
30
67°
44°
31
74°
53°
1
75°
53°
2
76°
55°
3
79°
57°
4
82°
58°
5
84°
60°
6
83°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Dunellen
Dunellen's May 2026 forecast shows daily high temperatures ranging from 67° to 84°, with overnight lows between 44° and 61°. The average high for May is 78° 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 Dunellen. See also: June | July | August.