S
M
T
W
T
F
S
26
97°
69°
27
97°
68°
28
95°
67°
29
85°
60°
30
85°
59°
31
86°
61°
1
89°
62°
2
92°
67°
3
97°
67°
4
97°
66°
5
96°
68°
6
96°
71°
7
97°
67°
8
91°
65°
9
90°
66°
10
88°
62°
11
89°
64°
12
90°
58°
13
85°
63°
14
93°
69°
15
95°
68°
16
94°
59°
17
86°
65°
18
87°
59°
19
82°
56°
20
82°
59°
21
85°
65°
22
90°
66°
23
93°
60°
24
81°
55°
25
80°
56°
26
81°
59°
27
83°
63°
28
89°
64°
29
87°
60°
30
84°
63°
31
86°
64°
1
90°
55°
2
79°
54°
3
Hist. Avg.
83°
57°
4
Hist. Avg.
83°
57°
5
Hist. Avg.
83°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Walla Walla
Walla Walla's August 2026 forecast shows daily high temperatures ranging from 79° to 97°, with overnight lows between 54° and 71°. The average high for August is 89° 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 Walla Walla. See also: September | October | November.
