S
M
T
W
T
F
S
26
77°
61°
27
77°
57°
28
82°
61°
29
88°
55°
30
79°
54°
31
77°
57°
1
77°
54°
2
81°
52°
3
88°
52°
4
79°
59°
5
75°
55°
6
72°
48°
7
75°
45°
8
79°
45°
9
86°
52°
10
81°
55°
11
79°
55°
12
90°
52°
13
93°
55°
14
90°
57°
15
82°
64°
16
77°
64°
17
81°
63°
18
79°
63°
19
75°
55°
20
73°
55°
21
70°
54°
22
73°
46°
23
75°
46°
24
75°
54°
25
81°
61°
26
81°
55°
27
75°
61°
28
75°
57°
29
68°
61°
30
72°
55°
31
73°
57°
1
73°
48°
2
68°
59°
3
75°
64°
4
70°
55°
5
72°
50°
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.