S
M
T
W
T
F
S
26
83°
56°
27
83°
56°
28
84°
57°
29
84°
57°
30
83°
56°
31
83°
56°
1
88°
57°
2
89°
58°
3
85°
57°
4
83°
56°
5
83°
56°
6
84°
57°
7
83°
57°
8
83°
58°
9
84°
57°
10
89°
56°
11
85°
56°
12
89°
55°
13
88°
57°
14
90°
60°
15
89°
59°
16
90°
61°
17
90°
62°
18
91°
62°
19
91°
61°
20
90°
62°
21
90°
61°
22
91°
61°
23
90°
60°
24
90°
61°
25
89°
61°
26
90°
62°
27
90°
60°
28
89°
60°
29
90°
58°
30
88°
57°
31
87°
55°
1
86°
56°
2
85°
55°
3
84°
53°
4
83°
54°
5
83°
53°
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 53° and 62°. The average high for August is 87° with an average low of 58°. 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.
