S
M
T
W
T
F
S
26
80°
63°
27
84°
59°
28
80°
61°
29
81°
59°
30
82°
59°
31
90°
59°
1
76°
60°
2
75°
57°
3
82°
55°
4
90°
59°
5
90°
58°
6
94°
61°
7
90°
61°
8
90°
60°
9
84°
58°
10
81°
58°
11
84°
58°
12
80°
63°
13
83°
59°
14
80°
62°
15
72°
61°
16
80°
62°
17
85°
60°
18
83°
55°
19
82°
56°
20
88°
60°
21
81°
61°
22
77°
58°
23
79°
51°
24
82°
52°
25
81°
49°
26
76°
47°
27
78°
50°
28
80°
49°
29
79°
50°
30
81°
51°
31
78°
48°
1
82°
52°
2
81°
53°
3
81°
53°
4
80°
52°
5
81°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Brush Prairie
Brush Prairie's August 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 47° and 61°. The average high for August is 81° with an average low of 53°. 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 Brush Prairie. See also: September | October | November.