S
M
T
W
T
F
S
26
62°
55°
27
63°
52°
28
66°
52°
29
66°
52°
30
66°
52°
1
63°
54°
2
61°
54°
3
65°
54°
4
64°
53°
5
65°
53°
6
67°
54°
7
62°
53°
8
60°
53°
9
64°
53°
10
64°
53°
11
72°
50°
12
62°
51°
13
65°
53°
14
66°
51°
15
66°
51°
16
66°
52°
17
73°
50°
18
80°
56°
19
82°
54°
20
73°
53°
21
70°
51°
22
69°
50°
23
69°
54°
24
65°
53°
25
62°
53°
26
65°
52°
27
68°
54°
28
67°
55°
29
67°
54°
30
68°
53°
31
66°
52°
1
70°
54°
2
69°
53°
3
69°
56°
4
71°
55°
5
71°
53°
6
70°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Bruno
San Bruno's May 2026 forecast shows daily high temperatures ranging from 62° to 71°, with overnight lows between 52° and 56°. The average high for May is 68° with an average low of 54°. 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 San Bruno. See also: June | July | August.
