S
M
T
W
T
F
S
29
46°
32°
30
51°
33°
1
44°
31°
2
40°
26°
3
39°
25°
4
38°
22°
5
39°
18°
6
36°
17°
7
37°
20°
8
37°
30°
9
38°
30°
10
37°
29°
11
37°
29°
12
40°
28°
13
50°
32°
14
50°
31°
15
49°
30°
16
44°
28°
17
44°
29°
18
36°
19°
19
39°
22°
20
46°
27°
21
49°
26°
22
46°
27°
23
48°
22°
24
47°
23°
25
43°
23°
26
40°
20°
27
39°
20°
28
45°
14°
29
36°
12°
30
34°
16°
31
33°
20°
1
38°
13°
2
35°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Rhineland
Rhineland's December 2026 forecast shows daily high temperatures ranging from 33° to 51°, with overnight lows between 12° and 33°. The average high for December is 41° with an average low of 24°. 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 Rhineland. See also: January | February | March.