S
M
T
W
T
F
S
26
91°
69°
27
91°
70°
28
89°
69°
29
88°
69°
30
86°
68°
31
83°
66°
1
83°
66°
2
84°
68°
3
87°
67°
4
86°
63°
5
85°
66°
6
84°
65°
7
87°
67°
8
80°
66°
9
80°
64°
10
81°
65°
11
83°
65°
12
84°
66°
13
86°
67°
14
87°
67°
15
85°
66°
16
87°
67°
17
82°
66°
18
87°
66°
19
87°
65°
20
86°
66°
21
77°
55°
22
77°
57°
23
78°
56°
24
77°
59°
25
80°
64°
26
85°
65°
27
87°
65°
28
87°
64°
29
89°
59°
30
87°
55°
31
78°
59°
1
78°
59°
2
83°
63°
3
87°
64°
4
87°
62°
5
88°
56°
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 77° to 91°, with overnight lows between 55° and 70°. The average high for August is 84° with an average low of 64°. 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.
