S
M
T
W
T
F
S
27
83°
57°
28
85°
54°
29
94°
63°
30
86°
60°
1
95°
57°
2
92°
60°
3
101°
61°
4
100°
63°
5
102°
64°
6
101°
62°
7
102°
61°
8
98°
60°
9
92°
62°
10
94°
62°
11
95°
63°
12
95°
60°
13
90°
61°
14
78°
54°
15
73°
55°
16
81°
59°
17
82°
60°
18
83°
60°
19
83°
59°
20
80°
58°
21
76°
58°
22
72°
57°
23
74°
57°
24
76°
56°
25
76°
57°
26
75°
56°
27
77°
56°
28
76°
55°
29
67°
52°
30
75°
54°
31
74°
53°
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 67° to 102°, with overnight lows between 52° and 64°. The average high for October is 85° with an average low of 58°. 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.