S
M
T
W
T
F
S
26
53°
39°
27
64°
38°
28
63°
38°
29
59°
47°
30
63°
47°
1
64°
43°
2
63°
48°
3
60°
46°
4
74°
46°
5
82°
57°
6
72°
52°
7
65°
50°
8
63°
53°
9
59°
52°
10
68°
55°
11
61°
47°
12
63°
48°
13
61°
52°
14
68°
54°
15
67°
56°
16
68°
52°
17
66°
51°
18
66°
53°
19
68°
52°
20
64°
48°
21
65°
49°
22
63°
50°
23
65°
49°
24
65°
51°
25
69°
56°
26
73°
57°
27
68°
55°
28
71°
54°
29
67°
51°
30
71°
58°
31
75°
59°
1
74°
60°
2
72°
58°
3
73°
58°
4
76°
61°
5
77°
61°
6
76°
60°
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 59° to 77°, with overnight lows between 47° and 61°. The average high for May is 68° with an average low of 54°. 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.