S
M
T
W
T
F
S
26
83°
61°
27
83°
60°
28
85°
59°
29
82°
56°
30
85°
60°
31
86°
62°
1
82°
61°
2
83°
59°
3
84°
56°
4
77°
54°
5
77°
56°
6
78°
54°
7
81°
56°
8
85°
58°
9
83°
57°
10
84°
56°
11
80°
54°
12
77°
54°
13
78°
55°
14
77°
54°
15
78°
55°
16
81°
61°
17
83°
62°
18
87°
61°
19
86°
60°
20
85°
53°
21
81°
62°
22
85°
61°
23
85°
53°
24
77°
55°
25
81°
53°
26
77°
55°
27
79°
51°
28
78°
55°
29
79°
52°
30
75°
51°
31
78°
54°
1
82°
61°
2
85°
61°
3
83°
59°
4
74°
50°
5
75°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Walnut Grove
Walnut Grove's August 2026 forecast shows daily high temperatures ranging from 74° to 87°, with overnight lows between 50° and 62°. The average high for August is 81° with an average low of 57°. 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 Grove. See also: September | October | November.