S
M
T
W
T
F
S
29
63°
45°
30
59°
46°
1
63°
44°
2
64°
43°
3
64°
45°
4
63°
46°
5
62°
45°
6
63°
45°
7
64°
46°
8
63°
43°
9
63°
42°
10
62°
46°
11
63°
45°
12
62°
38°
13
58°
39°
14
57°
38°
15
56°
39°
16
56°
37°
17
57°
44°
18
58°
46°
19
58°
41°
20
61°
41°
21
Hist. Avg.
58°
42°
22
Hist. Avg.
58°
42°
23
Hist. Avg.
58°
42°
24
Hist. Avg.
58°
42°
25
Hist. Avg.
58°
42°
26
Hist. Avg.
58°
42°
27
Hist. Avg.
58°
42°
28
Hist. Avg.
58°
42°
29
Hist. Avg.
58°
42°
30
Hist. Avg.
58°
42°
31
Hist. Avg.
58°
42°
1
Hist. Avg.
58°
42°
2
Hist. Avg.
58°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in San Jose
San Jose's December 2026 forecast shows daily high temperatures ranging from 56° to 64°, with overnight lows between 37° and 46°. The average high for December is 61° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in San Jose. See also: January | February | March.
