S
M
T
W
T
F
S
29
41°
31°
30
41°
31°
1
42°
32°
2
42°
31°
3
44°
32°
4
42°
34°
5
41°
36°
6
41°
36°
7
43°
39°
8
46°
38°
9
43°
34°
10
44°
31°
11
44°
30°
12
43°
31°
13
38°
29°
14
37°
29°
15
36°
30°
16
36°
28°
17
37°
28°
18
36°
29°
19
37°
29°
20
40°
36°
21
45°
39°
22
46°
39°
23
47°
38°
24
46°
34°
25
37°
35°
26
39°
36°
27
44°
37°
28
42°
37°
29
45°
36°
30
45°
35°
31
44°
36°
1
41°
37°
2
42°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Hennef
Hennef's December 2026 forecast shows daily high temperatures ranging from 36° to 47°, with overnight lows between 28° and 39°. The average high for December is 42° with an average low of 34°. 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 Hennef. See also: January | February | March.
