S
M
T
W
T
F
S
26
82°
61°
27
86°
63°
28
86°
66°
29
79°
64°
30
82°
63°
31
84°
57°
1
82°
61°
2
81°
70°
3
86°
66°
4
84°
59°
5
82°
70°
6
86°
68°
7
88°
68°
8
84°
68°
9
88°
68°
10
88°
66°
11
82°
66°
12
82°
64°
13
88°
64°
14
77°
68°
15
82°
63°
16
81°
68°
17
86°
70°
18
82°
64°
19
82°
57°
20
82°
63°
21
77°
59°
22
81°
59°
23
79°
61°
24
77°
57°
25
79°
54°
26
81°
54°
27
84°
64°
28
82°
63°
29
79°
61°
30
84°
63°
31
79°
66°
1
91°
72°
2
90°
72°
3
90°
68°
4
88°
66°
5
77°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Winchester
Winchester's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Winchester. See also: September | October | November.