S
M
T
W
T
F
S
27
72°
58°
28
72°
58°
29
73°
49°
30
70°
49°
1
66°
54°
2
67°
55°
3
70°
55°
4
72°
56°
5
71°
56°
6
70°
57°
7
71°
56°
8
72°
53°
9
71°
52°
10
69°
48°
11
65°
50°
12
64°
52°
13
61°
51°
14
61°
50°
15
64°
51°
16
66°
52°
17
68°
48°
18
68°
42°
19
59°
43°
20
59°
40°
21
58°
43°
22
57°
49°
23
61°
47°
24
64°
43°
25
58°
41°
26
56°
40°
27
55°
46°
28
58°
40°
29
62°
38°
30
62°
37°
31
65°
45°
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 55° to 73°, with overnight lows between 37° and 58°. The average high for October is 65° with an average low of 49°. 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.