S
M
T
W
T
F
S
26
82°
54°
27
84°
64°
28
81°
67°
29
84°
70°
30
76°
68°
31
88°
71°
1
85°
72°
2
84°
73°
3
82°
70°
4
81°
65°
5
81°
68°
6
94°
79°
7
94°
75°
8
91°
75°
9
92°
76°
10
89°
75°
11
88°
74°
12
84°
73°
13
85°
69°
14
85°
67°
15
83°
68°
16
81°
66°
17
82°
64°
18
81°
66°
19
79°
64°
20
80°
64°
21
77°
63°
22
80°
67°
23
84°
69°
24
77°
64°
25
80°
67°
26
83°
68°
27
84°
69°
28
85°
68°
29
83°
63°
30
77°
61°
31
76°
62°
1
77°
65°
2
76°
63°
3
76°
63°
4
77°
66°
5
77°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rumson
Rumson's August 2026 forecast shows daily high temperatures ranging from 76° to 92°, with overnight lows between 61° and 76°. The average high for August is 82° with an average low of 67°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Rumson. See also: September | October | November.