S
M
T
W
T
F
S
26
83°
51°
27
83°
57°
28
87°
55°
29
85°
55°
30
86°
56°
31
89°
57°
1
90°
59°
2
88°
57°
3
90°
56°
4
88°
55°
5
86°
58°
6
87°
56°
7
87°
55°
8
86°
55°
9
83°
51°
10
89°
55°
11
89°
53°
12
Hist. Avg.
82°
54°
13
Hist. Avg.
82°
53°
14
Hist. Avg.
82°
53°
15
Hist. Avg.
82°
53°
16
Hist. Avg.
81°
53°
17
Hist. Avg.
81°
53°
18
Hist. Avg.
81°
53°
19
Hist. Avg.
81°
53°
20
Hist. Avg.
81°
52°
21
Hist. Avg.
81°
52°
22
Hist. Avg.
81°
52°
23
Hist. Avg.
81°
52°
24
Hist. Avg.
81°
52°
25
Hist. Avg.
81°
52°
26
Hist. Avg.
80°
52°
27
Hist. Avg.
80°
51°
28
Hist. Avg.
80°
51°
29
Hist. Avg.
80°
51°
30
Hist. Avg.
80°
51°
31
Hist. Avg.
80°
50°
1
Hist. Avg.
80°
50°
2
Hist. Avg.
79°
50°
3
Hist. Avg.
79°
50°
4
Hist. Avg.
79°
50°
5
Hist. Avg.
79°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in San Jose
San Jose's August 2026 forecast shows daily high temperatures ranging from 83° to 90°, with overnight lows between 51° and 59°. The average high for August is 87° with an average low of 55°. 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.
