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