S
M
T
W
T
F
S
26
79°
69°
27
81°
69°
28
80°
68°
29
78°
69°
30
76°
69°
31
79°
68°
1
80°
69°
2
80°
67°
3
81°
68°
4
82°
68°
5
80°
66°
6
80°
67°
7
75°
68°
8
78°
65°
9
75°
63°
10
77°
61°
11
76°
67°
12
77°
67°
13
80°
66°
14
80°
61°
15
77°
60°
16
74°
61°
17
76°
66°
18
74°
61°
19
77°
60°
20
74°
60°
21
75°
61°
22
77°
64°
23
78°
60°
24
78°
59°
25
77°
60°
26
76°
61°
27
73°
59°
28
72°
63°
29
78°
66°
30
78°
64°
31
79°
57°
1
77°
56°
2
71°
58°
3
71°
57°
4
72°
57°
5
71°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Barnstable
Barnstable's August 2026 forecast shows daily high temperatures ranging from 71° to 82°, with overnight lows between 56° and 69°. The average high for August is 77° with an average low of 63°. 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 Barnstable. See also: September | October | November.
