S
M
T
W
T
F
S
26
53°
39°
27
64°
38°
28
63°
38°
29
59°
47°
30
63°
47°
1
59°
50°
2
57°
44°
3
58°
48°
4
64°
55°
5
72°
56°
6
66°
51°
7
60°
43°
8
57°
44°
9
60°
48°
10
61°
50°
11
61°
52°
12
60°
51°
13
60°
51°
14
62°
50°
15
63°
52°
16
64°
53°
17
64°
51°
18
65°
56°
19
72°
56°
20
71°
55°
21
66°
57°
22
72°
54°
23
66°
54°
24
70°
55°
25
68°
51°
26
66°
54°
27
66°
58°
28
68°
59°
29
74°
59°
30
73°
58°
31
72°
58°
1
70°
53°
2
67°
53°
3
66°
54°
4
69°
53°
5
68°
54°
6
69°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rumson
Rumson's May 2026 forecast shows daily high temperatures ranging from 57° to 74°, with overnight lows between 43° and 59°. The average high for May is 66° with an average low of 53°. 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 Rumson. See also: June | July | August.