S
M
T
W
T
F
S
26
80°
44°
27
65°
57°
28
60°
51°
29
61°
42°
30
62°
36°
1
57°
40°
2
58°
40°
3
69°
43°
4
76°
48°
5
55°
46°
6
58°
39°
7
65°
37°
8
62°
46°
9
77°
48°
10
69°
45°
11
71°
44°
12
82°
46°
13
71°
47°
14
72°
40°
15
77°
51°
16
75°
62°
17
84°
62°
18
75°
61°
19
76°
57°
20
71°
49°
21
73°
47°
22
71°
55°
23
76°
55°
24
78°
58°
25
85°
55°
26
82°
61°
27
84°
61°
28
83°
56°
29
81°
58°
30
78°
51°
31
78°
53°
1
82°
56°
2
77°
57°
3
79°
59°
4
80°
60°
5
80°
59°
6
81°
63°
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 77° to 84°, with overnight lows between 51° and 63°. The average high for May is 80° 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 San Jose. See also: June | July | August.
