S
M
T
W
T
F
S
26
95°
77°
27
91°
77°
28
90°
72°
29
88°
70°
30
82°
72°
31
77°
60°
1
83°
58°
2
84°
60°
3
86°
63°
4
85°
62°
5
84°
63°
6
86°
65°
7
91°
67°
8
91°
64°
9
93°
63°
10
91°
64°
11
96°
72°
12
86°
63°
13
79°
58°
14
81°
64°
15
83°
66°
16
87°
66°
17
88°
65°
18
83°
62°
19
82°
61°
20
84°
65°
21
80°
62°
22
81°
58°
23
78°
60°
24
79°
56°
25
78°
55°
26
78°
59°
27
80°
63°
28
84°
63°
29
83°
62°
30
76°
63°
31
81°
63°
1
86°
61°
2
85°
58°
3
81°
62°
4
86°
63°
5
86°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Walnut
Walnut's August 2026 forecast shows daily high temperatures ranging from 76° to 96°, with overnight lows between 55° and 72°. The average high for August is 84° with an average low of 63°. 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. See also: September | October | November.
