S
M
T
W
T
F
S
30
48°
45°
1
49°
40°
2
55°
38°
3
59°
44°
4
63°
37°
5
47°
35°
6
45°
42°
7
46°
43°
8
46°
42°
9
46°
42°
10
47°
42°
11
47°
42°
12
44°
42°
13
44°
40°
14
42°
40°
15
45°
41°
16
54°
43°
17
70°
46°
18
68°
52°
19
62°
50°
20
59°
52°
21
67°
56°
22
65°
56°
23
60°
50°
24
64°
55°
25
65°
50°
26
62°
50°
27
55°
47°
28
56°
37°
29
58°
33°
30
56°
40°
31
50°
40°
1
63°
49°
2
61°
48°
3
65°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mountain House
Mountain House's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 House. See also: January | February | March.
