S
M
T
W
T
F
S
26
71°
44°
27
66°
36°
28
69°
39°
29
69°
31°
30
57°
32°
1
36°
32°
2
59°
29°
3
70°
35°
4
72°
47°
5
63°
40°
6
66°
29°
7
73°
41°
8
79°
42°
9
81°
47°
10
77°
43°
11
87°
51°
12
91°
53°
13
89°
51°
14
83°
49°
15
80°
50°
16
82°
48°
17
80°
46°
18
76°
43°
19
80°
47°
20
79°
48°
21
81°
48°
22
71°
47°
23
80°
49°
24
82°
49°
25
73°
46°
26
76°
49°
27
82°
50°
28
82°
50°
29
76°
49°
30
74°
50°
31
75°
49°
1
75°
48°
2
76°
51°
3
80°
51°
4
77°
48°
5
77°
51°
6
78°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Jose
San Jose's May 2026 forecast shows daily high temperatures ranging from 63° to 91°, with overnight lows between 29° and 53°. The average high for May is 78° with an average low of 47°. 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 Jose. See also: June | July | August.
