S
M
T
W
T
F
S
26
65°
54°
27
65°
56°
28
68°
51°
29
68°
52°
30
68°
58°
1
69°
58°
2
66°
58°
3
65°
59°
4
67°
57°
5
65°
55°
6
68°
54°
7
69°
56°
8
69°
59°
9
69°
57°
10
69°
58°
11
67°
57°
12
68°
56°
13
69°
58°
14
70°
56°
15
69°
59°
16
69°
60°
17
70°
58°
18
71°
59°
19
76°
55°
20
77°
60°
21
71°
59°
22
70°
58°
23
69°
58°
24
70°
59°
25
68°
58°
26
69°
57°
27
68°
56°
28
68°
57°
29
71°
60°
30
69°
58°
31
72°
59°
1
72°
58°
2
71°
59°
3
72°
60°
4
71°
58°
5
70°
60°
6
74°
60°
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 68° to 74°, with overnight lows between 56° and 60°. The average high for May is 70° 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 May weather will actually feel in Brentwood. See also: June | July | August.