S
M
T
W
T
F
S
26
80°
60°
27
80°
62°
28
83°
65°
29
84°
66°
30
86°
65°
31
85°
60°
1
83°
64°
2
83°
64°
3
79°
60°
4
81°
64°
5
83°
66°
6
85°
65°
7
86°
59°
8
82°
58°
9
78°
59°
10
78°
62°
11
79°
59°
12
78°
58°
13
77°
58°
14
78°
59°
15
78°
57°
16
77°
59°
17
76°
58°
18
77°
62°
19
83°
60°
20
79°
59°
21
77°
63°
22
81°
57°
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 76° to 86°, with overnight lows between 57° and 66°. 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.
