S
M
T
W
T
F
S
26
88°
69°
27
95°
75°
28
83°
66°
29
84°
59°
30
84°
64°
31
76°
67°
1
73°
63°
2
80°
59°
3
83°
61°
4
82°
63°
5
84°
66°
6
82°
63°
7
85°
67°
8
87°
66°
9
85°
64°
10
84°
66°
11
84°
65°
12
82°
62°
13
83°
64°
14
79°
59°
15
77°
58°
16
78°
65°
17
85°
65°
18
79°
62°
19
78°
60°
20
79°
64°
21
82°
58°
22
77°
57°
23
77°
58°
24
78°
57°
25
77°
56°
26
76°
55°
27
77°
58°
28
79°
59°
29
82°
63°
30
82°
63°
31
77°
64°
1
82°
63°
2
79°
59°
3
76°
55°
4
78°
59°
5
82°
61°
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 87°, with overnight lows between 55° and 67°. 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.
