S
M
T
W
T
F
S
26
91°
50°
27
90°
50°
28
89°
54°
29
86°
50°
30
91°
51°
31
96°
65°
1
93°
51°
2
82°
50°
3
88°
52°
4
93°
54°
5
97°
61°
6
97°
62°
7
96°
63°
8
95°
62°
9
97°
63°
10
96°
62°
11
96°
61°
12
95°
62°
13
90°
59°
14
95°
64°
15
93°
63°
16
91°
60°
17
89°
62°
18
92°
63°
19
93°
63°
20
93°
64°
21
92°
63°
22
93°
64°
23
92°
64°
24
92°
63°
25
91°
62°
26
92°
62°
27
91°
61°
28
90°
60°
29
88°
59°
30
86°
60°
31
89°
60°
1
89°
59°
2
90°
61°
3
89°
60°
4
88°
60°
5
88°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Prosser
Prosser's August 2026 forecast shows daily high temperatures ranging from 82° to 97°, with overnight lows between 50° and 65°. The average high for August is 92° with an average low of 61°. 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 Prosser. See also: September | October | November.
