S
M
T
W
T
F
S
29
46°
32°
30
48°
32°
1
47°
33°
2
48°
31°
3
47°
26°
4
40°
24°
5
46°
29°
6
46°
30°
7
39°
25°
8
35°
22°
9
34°
19°
10
33°
19°
11
32°
27°
12
34°
26°
13
34°
25°
14
31°
16°
15
32°
19°
16
32°
23°
17
35°
25°
18
33°
23°
19
39°
21°
20
34°
15°
21
32°
14°
22
30°
17°
23
27°
20°
24
30°
17°
25
30°
19°
26
29°
13°
27
28°
9°
28
26°
6°
29
25°
6°
30
25°
20°
31
33°
17°
1
36°
12°
2
27°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Clarington
Clarington's December 2026 forecast shows daily high temperatures ranging from 25° to 48°, with overnight lows between 6° and 33°. The average high for December is 35° with an average low of 21°. 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 Clarington. See also: January | February | March.
