S
M
T
W
T
F
S
26
70°
55°
27
73°
61°
28
84°
66°
29
70°
66°
30
68°
63°
31
75°
63°
1
86°
66°
2
84°
70°
3
79°
66°
4
84°
63°
5
88°
63°
6
90°
73°
7
90°
75°
8
90°
75°
9
91°
70°
10
86°
66°
11
88°
68°
12
82°
64°
13
81°
66°
14
79°
63°
15
75°
55°
16
79°
54°
17
73°
64°
18
75°
66°
19
88°
68°
20
81°
66°
21
68°
64°
22
70°
66°
23
72°
65°
24
82°
66°
25
81°
63°
26
75°
61°
27
83°
61°
28
81°
66°
29
72°
59°
30
84°
57°
31
72°
64°
1
71°
60°
2
73°
61°
3
75°
64°
4
77°
63°
5
70°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cohasset
Cohasset's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Cohasset. See also: September | October | November.
