S
M
T
W
T
F
S
26
92°
76°
27
86°
77°
28
88°
76°
29
85°
75°
30
89°
76°
1
87°
76°
2
90°
76°
3
90°
76°
4
91°
77°
5
92°
77°
6
92°
77°
7
88°
77°
8
87°
76°
9
87°
76°
10
89°
77°
11
88°
77°
12
88°
76°
13
87°
76°
14
92°
75°
15
90°
77°
16
88°
78°
17
90°
78°
18
87°
77°
19
88°
76°
20
87°
76°
21
87°
77°
22
86°
78°
23
86°
77°
24
86°
78°
25
87°
78°
26
85°
77°
27
87°
76°
28
87°
76°
29
87°
78°
30
88°
77°
31
87°
78°
1
88°
79°
2
86°
79°
3
87°
78°
4
86°
77°
5
86°
79°
6
87°
79°
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 85° to 88°, with overnight lows between 76° and 79°. The average high for May is 87° with an average low of 78°. 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.
