S
M
T
W
T
F
S
26
82°
64°
27
88°
68°
28
86°
68°
29
87°
67°
30
87°
68°
31
82°
67°
1
83°
67°
2
82°
66°
3
81°
66°
4
82°
65°
5
83°
65°
6
82°
66°
7
82°
65°
8
81°
64°
9
81°
67°
10
80°
67°
11
81°
66°
12
80°
65°
13
80°
62°
14
81°
62°
15
80°
64°
16
80°
61°
17
81°
61°
18
80°
62°
19
81°
62°
20
84°
65°
21
86°
60°
22
82°
58°
23
79°
57°
24
80°
59°
25
79°
61°
26
80°
65°
27
85°
62°
28
78°
65°
29
81°
65°
30
87°
57°
31
78°
56°
1
78°
57°
2
79°
62°
3
78°
57°
4
79°
64°
5
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Hartsdale
Hartsdale's August 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 56° and 68°. The average high for August is 82° 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 Hartsdale. See also: September | October | November.