S
M
T
W
T
F
S
29
49°
28°
30
43°
28°
1
47°
27°
2
45°
26°
3
44°
21°
4
42°
17°
5
40°
22°
6
42°
25°
7
40°
24°
8
45°
24°
9
43°
18°
10
41°
22°
11
39°
20°
12
39°
14°
13
38°
12°
14
35°
13°
15
35°
16°
16
36°
14°
17
37°
12°
18
35°
13°
19
38°
14°
20
38°
13°
21
39°
15°
22
40°
21°
23
41°
20°
24
43°
22°
25
44°
23°
26
41°
15°
27
40°
17°
28
41°
20°
29
40°
15°
30
38°
14°
31
38°
16°
1
40°
17°
2
42°
20°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Plumas
Plumas's December 2026 forecast shows daily high temperatures ranging from 35° to 49°, with overnight lows between 12° and 28°. The average high for December is 41° with an average low of 19°. 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 Plumas. See also: January | February | March.