S
M
T
W
T
F
S
28
82°
50°
29
80°
59°
30
80°
52°
1
79°
45°
2
82°
47°
3
88°
52°
4
90°
49°
5
87°
49°
6
91°
51°
7
98°
53°
8
91°
54°
9
91°
51°
10
92°
53°
11
88°
55°
12
84°
58°
13
94°
49°
14
91°
59°
15
99°
64°
16
95°
67°
17
92°
56°
18
90°
51°
19
92°
51°
20
82°
60°
21
95°
57°
22
102°
60°
23
100°
64°
24
100°
57°
25
90°
57°
26
91°
50°
27
90°
50°
28
94°
56°
29
89°
60°
30
94°
57°
31
97°
60°
1
95°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Prosser
Prosser's July 2026 forecast shows daily high temperatures ranging from 89° to 97°, with overnight lows between 50° and 60°. The average high for July is 94° 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 July weather will actually feel in Prosser. See also: August | September | October.
