S
M
T
W
T
F
S
26
66°
52°
27
68°
52°
28
68°
53°
29
65°
50°
30
72°
51°
1
72°
54°
2
68°
53°
3
67°
54°
4
68°
54°
5
66°
51°
6
67°
48°
7
68°
51°
8
69°
49°
9
68°
50°
10
67°
53°
11
74°
54°
12
74°
54°
13
73°
53°
14
71°
52°
15
71°
50°
16
73°
50°
17
73°
53°
18
70°
54°
19
67°
52°
20
66°
48°
21
67°
50°
22
68°
54°
23
69°
50°
24
69°
48°
25
67°
49°
26
67°
48°
27
68°
52°
28
69°
56°
29
71°
54°
30
73°
54°
31
73°
55°
1
74°
54°
2
71°
54°
3
71°
52°
4
70°
54°
5
71°
58°
6
76°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sunnyvale
Sunnyvale's May 2026 forecast shows daily high temperatures ranging from 65° to 76°, with overnight lows between 48° and 59°. The average high for May is 70° with an average low of 52°. 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 Sunnyvale. See also: June | July | August.
