S
M
T
W
T
F
S
29
56°
39°
30
53°
32°
1
50°
33°
2
52°
36°
3
50°
31°
4
51°
37°
5
51°
37°
6
53°
31°
7
50°
30°
8
51°
32°
9
50°
35°
10
49°
39°
11
54°
38°
12
56°
32°
13
52°
27°
14
47°
26°
15
45°
29°
16
45°
27°
17
46°
27°
18
46°
30°
19
47°
33°
20
48°
30°
21
49°
34°
22
49°
32°
23
48°
30°
24
48°
32°
25
46°
34°
26
49°
28°
27
50°
29°
28
49°
36°
29
48°
39°
30
52°
33°
31
54°
29°
1
53°
32°
2
55°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mountain Ranch
Mountain Ranch's December 2026 forecast shows daily high temperatures ranging from 45° to 56°, with overnight lows between 26° and 39°. The average high for December is 50° with an average low of 32°. 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 Ranch. See also: January | February | March.
