S
M
T
W
T
F
S
26
85°
59°
27
79°
59°
28
79°
60°
29
80°
59°
30
79°
58°
31
79°
58°
1
78°
59°
2
80°
61°
3
83°
62°
4
81°
62°
5
80°
61°
6
82°
63°
7
79°
64°
8
81°
64°
9
83°
63°
10
84°
64°
11
83°
63°
12
80°
61°
13
83°
59°
14
78°
58°
15
78°
61°
16
81°
63°
17
82°
64°
18
83°
58°
19
Hist. Avg.
80°
59°
20
Hist. Avg.
80°
59°
21
Hist. Avg.
80°
59°
22
Hist. Avg.
80°
59°
23
Hist. Avg.
80°
59°
24
Hist. Avg.
80°
59°
25
Hist. Avg.
80°
58°
26
Hist. Avg.
79°
58°
27
Hist. Avg.
79°
58°
28
Hist. Avg.
79°
58°
29
Hist. Avg.
79°
58°
30
Hist. Avg.
78°
57°
31
Hist. Avg.
78°
57°
1
Hist. Avg.
78°
57°
2
Hist. Avg.
78°
57°
3
Hist. Avg.
78°
56°
4
Hist. Avg.
77°
56°
5
Hist. Avg.
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Cohasset
Cohasset's August 2026 forecast shows daily high temperatures ranging from 78° to 85°, with overnight lows between 58° and 64°. The average high for August is 81° with an average low of 61°. 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.
