S
M
T
W
T
F
S
26
64°
52°
27
69°
45°
28
72°
40°
29
76°
53°
30
72°
53°
1
59°
48°
2
57°
52°
3
66°
45°
4
79°
45°
5
82°
52°
6
84°
59°
7
73°
53°
8
73°
48°
9
77°
51°
10
85°
60°
11
71°
50°
12
73°
41°
13
79°
52°
14
77°
55°
15
75°
48°
16
85°
52°
17
92°
61°
18
94°
69°
19
93°
66°
20
94°
67°
21
89°
66°
22
78°
67°
23
84°
67°
24
83°
68°
25
83°
68°
26
85°
66°
27
82°
63°
28
81°
64°
29
79°
61°
30
83°
66°
31
82°
64°
1
82°
63°
2
81°
64°
3
80°
64°
4
84°
66°
5
85°
67°
6
86°
68°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Brentwood
Brentwood's May 2026 forecast shows daily high temperatures ranging from 78° to 94°, with overnight lows between 61° and 68°. The average high for May is 83° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Brentwood. See also: June | July | August.