S
M
T
W
T
F
S
26
79°
66°
27
81°
63°
28
84°
66°
29
93°
68°
30
82°
68°
31
77°
63°
1
79°
61°
2
81°
61°
3
84°
64°
4
86°
66°
5
79°
63°
6
72°
59°
7
79°
57°
8
82°
59°
9
86°
64°
10
79°
63°
11
75°
61°
12
86°
64°
13
93°
64°
14
93°
72°
15
79°
66°
16
79°
64°
17
81°
66°
18
79°
66°
19
N/A
20
72°
52°
21
71°
50°
22
72°
50°
23
74°
54°
24
74°
60°
25
72°
59°
26
75°
60°
27
72°
56°
28
71°
57°
29
71°
56°
30
72°
55°
31
70°
56°
1
72°
51°
2
72°
52°
3
71°
53°
4
72°
53°
5
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Brentwood
Brentwood's August 2026 forecast shows daily high temperatures ranging from 70° to 75°, with overnight lows between 50° and 60°. The average high for August is 72° with an average low of 54°. 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 Brentwood. See also: September | October | November.