S
M
T
W
T
F
S
26
90°
50°
27
91°
52°
28
88°
53°
29
86°
48°
30
91°
57°
31
94°
54°
1
85°
54°
2
79°
49°
3
81°
48°
4
87°
47°
5
92°
49°
6
97°
53°
7
101°
56°
8
97°
58°
9
93°
54°
10
94°
59°
11
93°
58°
12
89°
63°
13
87°
57°
14
87°
61°
15
89°
61°
16
92°
59°
17
95°
56°
18
96°
59°
19
92°
54°
20
96°
58°
21
96°
61°
22
95°
63°
23
87°
54°
24
88°
53°
25
93°
55°
26
93°
55°
27
87°
51°
28
83°
49°
29
77°
44°
30
78°
48°
31
83°
54°
1
83°
54°
2
74°
53°
3
75°
50°
4
76°
52°
5
75°
54°
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 74° to 87°, with overnight lows between 44° and 54°. The average high for August is 79° with an average low of 51°. 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.
