S
M
T
W
T
F
S
26
78°
52°
27
81°
53°
28
80°
59°
29
80°
56°
30
77°
55°
31
80°
59°
1
81°
60°
2
82°
57°
3
78°
52°
4
74°
56°
5
74°
60°
6
76°
56°
7
74°
52°
8
76°
53°
9
81°
53°
10
74°
57°
11
75°
59°
12
Hist. Avg.
79°
54°
13
Hist. Avg.
79°
54°
14
Hist. Avg.
78°
54°
15
Hist. Avg.
78°
54°
16
Hist. Avg.
78°
54°
17
Hist. Avg.
78°
53°
18
Hist. Avg.
78°
53°
19
Hist. Avg.
78°
53°
20
Hist. Avg.
77°
53°
21
Hist. Avg.
77°
52°
22
Hist. Avg.
77°
52°
23
Hist. Avg.
77°
52°
24
Hist. Avg.
76°
52°
25
Hist. Avg.
76°
52°
26
Hist. Avg.
76°
51°
27
Hist. Avg.
76°
51°
28
Hist. Avg.
75°
51°
29
Hist. Avg.
75°
50°
30
Hist. Avg.
75°
50°
31
Hist. Avg.
74°
50°
1
Hist. Avg.
74°
50°
2
Hist. Avg.
74°
49°
3
Hist. Avg.
73°
49°
4
Hist. Avg.
73°
49°
5
Hist. Avg.
73°
48°
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 74° to 82°, with overnight lows between 52° and 60°. The average high for August is 78° with an average low of 56°. 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.
