S
M
T
W
T
F
S
29
41°
29°
30
44°
31°
1
43°
30°
2
42°
30°
3
44°
28°
4
42°
27°
5
41°
27°
6
40°
28°
7
42°
26°
8
35°
25°
9
33°
26°
10
35°
25°
11
34°
25°
12
35°
22°
13
34°
17°
14
34°
15°
15
30°
14°
16
28°
16°
17
30°
15°
18
29°
21°
19
30°
20°
20
35°
20°
21
33°
17°
22
31°
17°
23
30°
6°
24
30°
14°
25
24°
13°
26
27°
5°
27
24°
2°
28
22°
5°
29
24°
3°
30
23°
8°
31
25°
17°
1
35°
14°
2
35°
8°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Calais
Calais's December 2026 forecast shows daily high temperatures ranging from 22° to 44°, with overnight lows between 2° and 31°. The average high for December is 33° with an average low of 18°. 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 Calais. See also: January | February | March.
