S
M
T
W
T
F
S
26
86°
61°
27
88°
61°
28
89°
60°
29
90°
62°
30
90°
62°
31
89°
61°
1
83°
57°
2
83°
58°
3
88°
59°
4
83°
58°
5
83°
58°
6
86°
61°
7
89°
60°
8
83°
60°
9
87°
58°
10
89°
59°
11
91°
61°
12
90°
58°
13
90°
57°
14
89°
58°
15
90°
58°
16
90°
61°
17
89°
62°
18
91°
61°
19
91°
61°
20
90°
59°
21
89°
56°
22
86°
55°
23
84°
55°
24
84°
58°
25
85°
56°
26
90°
58°
27
90°
60°
28
89°
61°
29
90°
58°
30
89°
59°
31
90°
58°
1
89°
57°
2
88°
57°
3
88°
58°
4
89°
60°
5
90°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Walnut Creek
Walnut Creek's August 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 55° and 62°. The average high for August is 88° with an average low of 59°. 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 Walnut Creek. See also: September | October | November.
