S
M
T
W
T
F
S
26
91°
50°
27
90°
50°
28
89°
54°
29
86°
50°
30
91°
51°
31
N/A
1
93°
50°
2
82°
51°
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°
61°
13
94°
62°
14
90°
58°
15
93°
63°
16
91°
60°
17
93°
62°
18
93°
64°
19
92°
63°
20
92°
62°
21
88°
60°
22
86°
60°
23
88°
61°
24
83°
57°
25
82°
59°
26
89°
60°
27
91°
61°
28
90°
60°
29
89°
61°
30
82°
58°
31
83°
59°
1
79°
55°
2
78°
53°
3
78°
54°
4
83°
58°
5
81°
56°
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 78° to 97°, with overnight lows between 50° and 64°. The average high for August is 89° with an average low of 59°. 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.
