S
M
T
W
T
F
S
26
77°
58°
27
77°
57°
28
80°
58°
29
78°
59°
30
84°
59°
31
85°
59°
1
86°
60°
2
89°
61°
3
89°
59°
4
86°
60°
5
85°
59°
6
84°
60°
7
86°
62°
8
87°
60°
9
84°
62°
10
85°
61°
11
81°
61°
12
81°
60°
13
82°
61°
14
83°
66°
15
78°
60°
16
78°
60°
17
78°
59°
18
79°
59°
19
78°
58°
20
79°
58°
21
81°
60°
22
81°
59°
23
79°
61°
24
83°
60°
25
83°
60°
26
82°
62°
27
83°
62°
28
84°
61°
29
82°
62°
30
81°
61°
31
83°
61°
1
81°
59°
2
81°
60°
3
83°
59°
4
80°
61°
5
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in San Jose
San Jose's August 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 58° and 66°. The average high for August is 82° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in San Jose. See also: September | October | November.
