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