S
M
T
W
T
F
S
29
58°
42°
30
59°
45°
1
64°
48°
2
62°
48°
3
60°
47°
4
60°
43°
5
59°
42°
6
61°
44°
7
61°
45°
8
62°
45°
9
61°
44°
10
62°
45°
11
62°
45°
12
61°
44°
13
60°
44°
14
61°
46°
15
61°
43°
16
61°
47°
17
Hist. Avg.
57°
38°
18
Hist. Avg.
57°
38°
19
Hist. Avg.
57°
38°
20
Hist. Avg.
57°
38°
21
Hist. Avg.
57°
38°
22
Hist. Avg.
57°
38°
23
Hist. Avg.
57°
38°
24
Hist. Avg.
57°
38°
25
Hist. Avg.
57°
38°
26
Hist. Avg.
57°
38°
27
Hist. Avg.
57°
38°
28
Hist. Avg.
57°
38°
29
Hist. Avg.
57°
38°
30
Hist. Avg.
57°
38°
31
Hist. Avg.
57°
38°
1
Hist. Avg.
57°
38°
2
Hist. Avg.
57°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Mountain View
Mountain View's December 2026 forecast shows daily high temperatures ranging from 58° to 64°, with overnight lows between 42° and 48°. The average high for December is 61° with an average low of 45°. 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 Mountain View. See also: January | February | March.
