S
M
T
W
T
F
S
26
87°
69°
27
89°
69°
28
94°
70°
29
94°
70°
30
95°
69°
31
96°
70°
1
95°
69°
2
92°
69°
3
96°
70°
4
89°
65°
5
85°
67°
6
85°
62°
7
86°
64°
8
95°
69°
9
95°
69°
10
94°
70°
11
94°
68°
12
90°
67°
13
88°
67°
14
91°
55°
15
83°
56°
16
84°
59°
17
88°
64°
18
92°
68°
19
94°
69°
20
92°
60°
21
91°
68°
22
92°
69°
23
95°
56°
24
84°
58°
25
88°
58°
26
86°
63°
27
90°
61°
28
87°
61°
29
86°
53°
30
79°
54°
31
81°
56°
1
86°
66°
2
89°
64°
3
90°
58°
4
82°
52°
5
77°
54°
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 77° to 96°, with overnight lows between 52° and 70°. The average high for August is 89° with an average low of 64°. 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.
