S
M
T
W
T
F
S
29
29°
16°
30
31°
14°
1
30°
12°
2
27°
16°
3
28°
10°
4
32°
9°
5
26°
14°
6
28°
20°
7
30°
22°
8
37°
21°
9
41°
18°
10
39°
14°
11
31°
16°
12
28°
12°
13
27°
13°
14
25°
16°
15
26°
14°
16
26°
14°
17
28°
12°
18
29°
11°
19
26°
9°
20
29°
15°
21
27°
14°
22
33°
1°
23
32°
5°
24
24°
17°
25
33°
11°
26
33°
0°
27
31°
3°
28
18°
-4°
29
25°
-3°
30
16°
7°
31
31°
1°
1
32°
-6°
2
27°
5°
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 16° to 41°, with overnight lows between -6° and 22°. The average high for December is 29° with an average low of 11°. 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.
