S
M
T
W
T
F
S
26
94°
65°
27
94°
62°
28
94°
62°
29
93°
63°
30
94°
60°
31
92°
58°
1
91°
56°
2
87°
59°
3
89°
60°
4
95°
64°
5
96°
64°
6
96°
65°
7
95°
63°
8
96°
61°
9
95°
61°
10
95°
52°
11
88°
54°
12
84°
53°
13
85°
54°
14
87°
54°
15
91°
57°
16
92°
60°
17
94°
60°
18
93°
59°
19
92°
58°
20
92°
57°
21
90°
53°
22
84°
50°
23
83°
49°
24
82°
50°
25
83°
51°
26
80°
48°
27
79°
49°
28
80°
49°
29
80°
51°
30
81°
54°
31
83°
54°
1
86°
56°
2
87°
57°
3
89°
58°
4
91°
57°
5
89°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Toppenish
Toppenish's August 2026 forecast shows daily high temperatures ranging from 79° to 96°, with overnight lows between 48° and 65°. The average high for August is 89° 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 Toppenish. See also: September | October | November.
