S
M
T
W
T
F
S
26
91°
70°
27
92°
69°
28
100°
73°
29
92°
70°
30
91°
69°
31
86°
68°
1
86°
66°
2
88°
68°
3
91°
69°
4
91°
69°
5
90°
68°
6
91°
68°
7
85°
67°
8
85°
64°
9
86°
63°
10
86°
67°
11
88°
68°
12
90°
68°
13
91°
69°
14
91°
67°
15
85°
65°
16
84°
63°
17
84°
63°
18
85°
64°
19
86°
66°
20
86°
66°
21
84°
64°
22
84°
61°
23
85°
62°
24
83°
61°
25
83°
60°
26
84°
62°
27
88°
65°
28
83°
58°
29
84°
59°
30
85°
60°
31
84°
63°
1
85°
64°
2
84°
62°
3
86°
63°
4
89°
65°
5
90°
64°
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 83° to 100°, with overnight lows between 58° and 73°. The average high for August is 87° with an average low of 65°. 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.
