S
M
T
W
T
F
S
26
85°
67°
27
85°
68°
28
84°
68°
29
82°
67°
30
80°
67°
31
85°
68°
1
84°
67°
2
85°
68°
3
85°
67°
4
85°
67°
5
84°
65°
6
79°
66°
7
80°
63°
8
79°
61°
9
79°
61°
10
80°
62°
11
79°
66°
12
82°
66°
13
84°
65°
14
84°
60°
15
79°
60°
16
78°
64°
17
80°
66°
18
78°
60°
19
81°
60°
20
79°
61°
21
81°
60°
22
82°
60°
23
82°
59°
24
81°
58°
25
81°
59°
26
80°
63°
27
82°
64°
28
79°
63°
29
82°
66°
30
82°
62°
31
80°
56°
1
78°
55°
2
74°
57°
3
74°
56°
4
75°
56°
5
74°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Chappaqua
Chappaqua's August 2026 forecast shows daily high temperatures ranging from 74° to 85°, with overnight lows between 55° and 68°. The average high for August is 81° 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 Chappaqua. See also: September | October | November.
