S
M
T
W
T
F
S
26
88°
68°
27
84°
67°
28
83°
64°
29
78°
62°
30
77°
62°
31
79°
65°
1
81°
67°
2
85°
67°
3
84°
66°
4
85°
64°
5
80°
66°
6
84°
67°
7
84°
66°
8
78°
66°
9
83°
65°
10
77°
61°
11
80°
64°
12
80°
66°
13
83°
65°
14
78°
59°
15
77°
59°
16
78°
62°
17
77°
61°
18
80°
62°
19
83°
65°
20
84°
65°
21
84°
64°
22
77°
60°
23
83°
65°
24
80°
64°
25
85°
61°
26
85°
63°
27
84°
56°
28
76°
55°
29
74°
53°
30
76°
58°
31
79°
61°
1
76°
61°
2
82°
53°
3
75°
51°
4
73°
52°
5
73°
51°
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 73° to 88°, with overnight lows between 51° and 68°. The average high for August is 80° with an average low of 62°. 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.
