S
M
T
W
T
F
S
30
48°
37°
1
43°
32°
2
41°
28°
3
41°
36°
4
39°
36°
5
41°
36°
6
46°
37°
7
52°
45°
8
59°
50°
9
54°
43°
10
50°
39°
11
50°
39°
12
50°
37°
13
45°
41°
14
45°
41°
15
45°
37°
16
41°
34°
17
39°
30°
18
48°
39°
19
48°
41°
20
48°
45°
21
50°
39°
22
43°
36°
23
43°
39°
24
39°
30°
25
37°
28°
26
41°
28°
27
43°
27°
28
43°
25°
29
37°
23°
30
39°
25°
31
39°
25°
1
39°
34°
2
37°
34°
3
34°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Mainz
Mainz'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 Mainz. See also: January | February | March.
