S
M
T
W
T
F
S
29
40°
33°
30
42°
32°
1
42°
35°
2
43°
29°
3
43°
27°
4
38°
34°
5
39°
36°
6
42°
42°
7
50°
38°
8
54°
33°
9
53°
31°
10
39°
30°
11
40°
29°
12
40°
28°
13
38°
31°
14
39°
29°
15
37°
26°
16
35°
29°
17
36°
30°
18
38°
32°
19
39°
35°
20
41°
36°
21
49°
30°
22
49°
31°
23
40°
37°
24
45°
36°
25
49°
32°
26
43°
31°
27
40°
24°
28
41°
20°
29
35°
22°
30
33°
15°
31
34°
17°
1
26°
19°
2
34°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Willoughby
Willoughby's December 2026 forecast shows daily high temperatures ranging from 26° to 54°, with overnight lows between 15° and 42°. The average high for December is 41° with an average low of 30°. 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 Willoughby. See also: January | February | March.
