S
M
T
W
T
F
S
26
82°
58°
27
82°
56°
28
87°
58°
29
81°
59°
30
88°
58°
31
95°
56°
1
88°
58°
2
100°
55°
3
102°
56°
4
95°
58°
5
81°
57°
6
89°
54°
7
92°
59°
8
81°
58°
9
98°
57°
10
89°
60°
11
87°
56°
12
82°
55°
13
74°
58°
14
73°
59°
15
70°
58°
16
89°
59°
17
85°
57°
18
87°
58°
19
87°
59°
20
88°
60°
21
87°
59°
22
87°
58°
23
85°
59°
24
84°
58°
25
87°
58°
26
88°
59°
27
87°
58°
28
88°
57°
29
87°
60°
30
83°
56°
31
83°
60°
1
82°
59°
2
83°
60°
3
88°
61°
4
88°
61°
5
86°
60°
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 82° to 89°, with overnight lows between 56° and 61°. The average high for August is 86° 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.
