S
M
T
W
T
F
S
27
67°
59°
28
62°
57°
29
72°
56°
30
70°
60°
1
74°
60°
2
79°
65°
3
72°
56°
4
63°
55°
5
71°
54°
6
61°
44°
7
65°
39°
8
76°
50°
9
72°
50°
10
67°
54°
11
69°
61°
12
70°
58°
13
72°
49°
14
60°
42°
15
58°
45°
16
61°
50°
17
62°
49°
18
59°
46°
19
62°
49°
20
62°
50°
21
63°
44°
22
56°
50°
23
57°
40°
24
55°
39°
25
55°
45°
26
62°
47°
27
64°
38°
28
53°
38°
29
53°
37°
30
54°
42°
31
59°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Brentwood
Brentwood's October 2026 forecast shows daily high temperatures ranging from 53° to 76°, with overnight lows between 37° and 61°. The average high for October is 62° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Brentwood. See also: November | December | January.