S
M
T
W
T
F
S
26
93°
69°
27
93°
68°
28
90°
66°
29
90°
69°
30
92°
67°
31
97°
65°
1
96°
67°
2
96°
68°
3
92°
67°
4
90°
65°
5
89°
65°
6
91°
67°
7
94°
68°
8
97°
68°
9
94°
69°
10
93°
71°
11
92°
70°
12
89°
68°
13
83°
67°
14
84°
66°
15
86°
67°
16
90°
64°
17
92°
65°
18
95°
67°
19
97°
66°
20
96°
67°
21
98°
71°
22
97°
70°
23
101°
70°
24
100°
70°
25
98°
71°
26
101°
73°
27
100°
73°
28
101°
75°
29
97°
68°
30
92°
67°
31
87°
63°
1
86°
64°
2
86°
63°
3
90°
64°
4
91°
63°
5
92°
66°
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 86° to 101°, with overnight lows between 63° and 75°. The average high for August is 93° with an average low of 67°. 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.
