S
M
T
W
T
F
S
26
70°
57°
27
72°
52°
28
72°
53°
29
74°
54°
30
75°
55°
31
75°
55°
1
71°
55°
2
71°
56°
3
72°
56°
4
71°
57°
5
70°
55°
6
70°
56°
7
70°
55°
8
71°
55°
9
71°
56°
10
70°
52°
11
70°
52°
12
72°
53°
13
71°
52°
14
70°
54°
15
74°
55°
16
73°
54°
17
74°
53°
18
75°
53°
19
75°
55°
20
74°
57°
21
74°
56°
22
73°
55°
23
74°
55°
24
74°
54°
25
73°
55°
26
73°
55°
27
72°
56°
28
73°
53°
29
69°
52°
30
68°
51°
31
71°
51°
1
68°
52°
2
71°
53°
3
69°
53°
4
69°
54°
5
66°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Winterbourne
Winterbourne's August 2026 forecast shows daily high temperatures ranging from 66° to 75°, with overnight lows between 50° and 57°. The average high for August is 72° with an average low of 54°. 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 Winterbourne. See also: September | October | November.