S
M
T
W
T
F
S
26
82°
59°
27
84°
64°
28
81°
66°
29
77°
64°
30
77°
64°
31
N/A
1
87°
69°
2
83°
71°
3
82°
67°
4
84°
67°
5
83°
73°
6
86°
70°
7
87°
70°
8
86°
69°
9
84°
68°
10
85°
67°
11
82°
64°
12
80°
63°
13
81°
62°
14
78°
64°
15
80°
60°
16
78°
59°
17
84°
63°
18
80°
60°
19
79°
66°
20
81°
61°
21
79°
59°
22
78°
63°
23
85°
66°
24
86°
66°
25
85°
65°
26
82°
65°
27
77°
64°
28
77°
65°
29
81°
65°
30
82°
64°
31
82°
64°
1
81°
59°
2
75°
56°
3
74°
58°
4
74°
56°
5
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in New Windsor
New Windsor's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 55° and 73°. The average high for August is 81° 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 New Windsor. See also: September | October | November.