S
M
T
W
T
F
S
26
86°
68°
27
86°
68°
28
85°
69°
29
83°
68°
30
81°
68°
31
86°
67°
1
85°
69°
2
86°
67°
3
86°
67°
4
86°
68°
5
85°
68°
6
80°
67°
7
81°
64°
8
80°
62°
9
80°
62°
10
81°
61°
11
80°
67°
12
83°
67°
13
85°
66°
14
85°
61°
15
80°
61°
16
79°
65°
17
81°
67°
18
79°
61°
19
82°
61°
20
80°
62°
21
82°
61°
22
83°
61°
23
83°
60°
24
82°
59°
25
82°
60°
26
81°
64°
27
83°
65°
28
80°
64°
29
83°
66°
30
83°
63°
31
81°
57°
1
79°
56°
2
75°
58°
3
75°
57°
4
76°
57°
5
75°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cos Cob
Cos Cob's August 2026 forecast shows daily high temperatures ranging from 75° to 86°, with overnight lows between 56° and 69°. The average high for August is 82° with an average low of 64°. 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 Cos Cob. See also: September | October | November.
