S
M
T
W
T
F
S
29
79°
68°
30
82°
66°
1
82°
67°
2
81°
67°
3
81°
66°
4
80°
67°
5
81°
67°
6
81°
66°
7
80°
65°
8
81°
65°
9
79°
66°
10
80°
66°
11
80°
65°
12
81°
66°
13
80°
65°
14
81°
66°
15
82°
65°
16
81°
67°
17
81°
66°
18
80°
65°
19
81°
64°
20
79°
65°
21
79°
64°
22
80°
64°
23
79°
65°
24
79°
66°
25
80°
66°
26
81°
65°
27
79°
64°
28
80°
65°
29
81°
64°
30
79°
65°
31
79°
65°
1
80°
64°
2
79°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in La Plena
La Plena's December 2026 forecast shows daily high temperatures ranging from 79° to 82°, with overnight lows between 64° and 68°. The average high for December is 80° with an average low of 65°. 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 La Plena. See also: January | February | March.