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December

Calais Weather in December with Sea Temperature

December weather in Calais includes average daytime air +9°C, nighttime +6°C, average sea temperature +11°C. Daily water temperatures usually range from +10°C to +12°C, which is cool for long swims. The tables below also show air temperature, wind, rain and humidity; for near-term water data, open the current 30-day water temperature forecast.

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Averaged values across several years

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

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December	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+9°C	+6°C	+12°C	8 m/s	0.3 mm	75%
2Tue	+9°C	+5°C	+12°C	7 m/s	0.3 mm	79%
3Wed	+7°C	+4°C	+11°C	7 m/s	0.5 mm	77%
4Thu	+8°C	+5°C	+11°C	7 m/s	0.5 mm	83%
5Fri	+9°C	+5°C	+11°C	7 m/s	0.6 mm	84%
6Sat	+9°C	+6°C	+11°C	7 m/s	0.6 mm	79%
7Sun	+9°C	+6°C	+11°C	8 m/s	0.4 mm	78%
8Mon	+9°C	+6°C	+11°C	8 m/s	0.7 mm	80%
9Tue	+10°C	+7°C	+11°C	8 m/s	0.9 mm	77%
10Wed	+9°C	+7°C	+11°C	8 m/s	0.2 mm	83%
11Thu	+9°C	+6°C	+11°C	7 m/s	0.5 mm	84%
12Fri	+9°C	+6°C	+11°C	6 m/s	0.3 mm	89%
13Sat	+8°C	+6°C	+11°C	5 m/s	0.1 mm	80%
14Sun	+9°C	+6°C	+10°C	6 m/s	0.2 mm	82%
15Mon	+10°C	+7°C	+10°C	6 m/s	0.1 mm	81%
16Tue	+10°C	+8°C	+10°C	6 m/s	0 mm	82%
17Wed	+9°C	+7°C	+10°C	6 m/s	0.2 mm	84%
18Thu	+11°C	+7°C	+10°C	9 m/s	0.3 mm	81%
19Fri	+12°C	+8°C	+10°C	9 m/s	0.9 mm	85%
20Sat	+10°C	+7°C	+10°C	7 m/s	0.2 mm	78%
21Sun	+11°C	+8°C	+10°C	7 m/s	0.7 mm	83%
22Mon	+10°C	+7°C	+10°C	8 m/s	0.6 mm	78%
23Tue	+10°C	+7°C	+10°C	8 m/s	0.6 mm	81%
24Wed	+10°C	+7°C	+10°C	9 m/s	0.4 mm	85%
25Thu	+9°C	+7°C	+10°C	8 m/s	1.2 mm	82%
26Fri	+10°C	+6°C	+10°C	7 m/s	0.2 mm	80%
27Sat	+10°C	+6°C	+10°C	7 m/s	0.8 mm	81%
28Sun	+9°C	+7°C	+10°C	8 m/s	0.9 mm	83%
29Mon	+9°C	+6°C	+10°C	8 m/s	0.6 mm	83%
30Tue	+10°C	+7°C	+10°C	9 m/s	0.4 mm	82%
31Wed	+10°C	+7°C	+10°C	9 m/s	1.3 mm	84%

Sea water temperature by months

Water +11°C

Day and night air temperature

Day +9°C Night +6°C

Weather highs and lows in Calais for december

Warmest day: 19 december, +12°C
Coldest night: 3 december, +4°C
Max precipitation: 31 december, 1.3 mm
Warmest sea water: 1 december, +12°C
Coldest sea water: 14 december, +10°C

Climate in Calais in december

Average daytime temperature: +9°C
Average nighttime temperature: +6°C
Sea water temperature: —
Precipitation (monthly average): 15.4 mm
Days with precipitation: 5.3
Humidity: 81%
Wind: 7 m/s
Data: 6 years / coverage 100%

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

December	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+9°C	+7°C	—	10-12 m/s, SSW	0 mm	74%
2Tue	+10°C	+7°C	—	9-15 m/s, SSW	1.4 mm	84%
3Wed	+10°C	+6°C	—	6-8 m/s, SSW	0 mm	80%
4Thu	+9°C	+6°C	—	7-9 m/s, WSW	0.3 mm	84%
5Fri	+9°C	+6°C	—	7-13 m/s, SSW	0.1 mm	79%
6Sat	+12°C	+8°C	—	14-16 m/s, SW	1.4 mm	85%
7Sun	+14°C	+11°C	—	11-16 m/s, S	0.3 mm	88%
8Mon	+13°C	+12°C	—	8-10 m/s, SW	0.7 mm	90%
9Tue	+14°C	+12°C	—	10-11 m/s, SSW	0.2 mm	78%
10Wed	+13°C	+11°C	—	8-10 m/s, SW	0 mm	91%
11Thu	+11°C	+8°C	—	6 m/s, SSW	0 mm	86%
12Fri	+12°C	+9°C	—	6-9 m/s, SSW	0.1 mm	90%
13Sat	+11°C	+9°C	—	3-4 m/s, WSW	0 mm	75%
14Sun	+10°C	+7°C	—	6-7 m/s, SSW	0 mm	85%
15Mon	+11°C	+8°C	—	8-9 m/s, SSW	0 mm	84%
16Tue	+12°C	+10°C	—	6-8 m/s, S	0 mm	84%
17Wed	+10°C	+9°C	—	5-7 m/s, SW	0.4 mm	85%
18Thu	+13°C	+9°C	—	12-14 m/s, S	0.6 mm	80%
19Fri	+12°C	+9°C	—	8-11 m/s, WSW	0.2 mm	79%
20Sat	+8°C	+5°C	—	4-5 m/s, SSE	0.1 mm	83%
21Sun	+10°C	+8°C	—	5-6 m/s, ESE	1 mm	92%
22Mon	+10°C	+7°C	—	5 m/s, ESE	0 mm	79%
23Tue	+9°C	+6°C	—	6-9 m/s, ENE	0 mm	78%
24Wed	+5°C	+4°C	—	12-14 m/s, ENE	0 mm	70%
25Thu	+4°C	+2°C	—	13-16 m/s, ENE	0 mm	50%
26Fri	+5°C	+1°C	—	8 m/s, E	0 mm	64%
27Sat	+8°C	+3°C	—	8-10 m/s, ENE	0 mm	68%
28Sun	+8°C	+4°C	—	7-8 m/s, NE	0 mm	80%
29Mon	+8°C	+4°C	—	7-8 m/s, NE	0.1 mm	76%
30Tue	+8°C	+5°C	—	10-11 m/s, NE	0.1 mm	62%
31Wed	+7°C	+4°C	—	6-7 m/s, NNW	0.2 mm	72%

Weather highs and lows in Calais for december

Warmest day: 7 december, +14°C
Coldest night: 26 december, +1°C
Max precipitation: 2 december, 1.4 mm
Warmest water: —
Coldest water: —

Climate in Calais in december

Year: 2025
Average daytime temperature: +10°C
Average nighttime temperature: +7°C
Water temperature: —
Precipitation (month): 7.2 mm
Days with precipitation: 3
Humidity: 79%
Wind: 8 m/s

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

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December	Day	Night	Sea t°	Wind	Precip	Humidity
1Sun	+12°C	+8°C	+12°C	7-8 m/s, SSW	0 mm	82%
2Mon	+12°C	+9°C	+12°C	8-9 m/s, W	0.4 mm	85%
3Tue	+9°C	+6°C	+11°C	5-9 m/s, N	0.2 mm	68%
4Wed	+11°C	+6°C	+11°C	4-5 m/s, WSW	0.1 mm	81%
5Thu	+13°C	+8°C	+11°C	11-12 m/s, SSW	0.5 mm	88%
6Fri	+11°C	+8°C	+11°C	10-13 m/s, NW	0 mm	69%
7Sat	+13°C	+8°C	+11°C	14-17 m/s, SW	0.7 mm	82%
8Sun	+9°C	+7°C	+11°C	14-16 m/s, NE	2.5 mm	82%
9Mon	+10°C	+8°C	+11°C	11-13 m/s, NE	0.1 mm	74%
10Tue	+8°C	+7°C	+11°C	9-11 m/s, ENE	0 mm	82%
11Wed	+8°C	+6°C	+11°C	6-7 m/s, ENE	0 mm	75%
12Thu	+6°C	+4°C	+11°C	4 m/s, E	0 mm	82%
13Fri	+6°C	+4°C	+11°C	3-4 m/s, SE	0 mm	80%
14Sat	+8°C	+5°C	+10°C	6-7 m/s, WNW	0.1 mm	78%
15Sun	+11°C	+7°C	+10°C	7-8 m/s, W	0 mm	86%
16Mon	+11°C	+10°C	+10°C	9-10 m/s, WSW	0 mm	84%
17Tue	+11°C	+9°C	+10°C	6 m/s, SSW	0 mm	88%
18Wed	+13°C	+9°C	+10°C	12-15 m/s, SW	0.3 mm	85%
19Thu	+13°C	+6°C	+10°C	11-15 m/s, WNW	1.3 mm	79%
20Fri	+10°C	+6°C	+10°C	8-9 m/s, WSW	0 mm	74%
21Sat	+12°C	+8°C	+10°C	10-14 m/s, WSW	1 mm	84%
22Sun	+9°C	+6°C	+10°C	12-13 m/s, W	0.6 mm	68%
23Mon	+7°C	+6°C	+10°C	10-13 m/s, NW	0 mm	71%
24Tue	+10°C	+6°C	+10°C	4-5 m/s, W	0.1 mm	91%
25Wed	+11°C	+10°C	+10°C	3-4 m/s, WSW	0 mm	92%
26Thu	+11°C	+9°C	+10°C	2 m/s, E	0 mm	90%
27Fri	+10°C	+8°C	+10°C	2 m/s, ENE	0 mm	89%
28Sat	+8°C	+6°C	+10°C	1-3 m/s, SSE	0 mm	78%
29Sun	+9°C	+6°C	+10°C	4-6 m/s, WSW	0 mm	82%
30Mon	+10°C	+8°C	+10°C	7 m/s, SW	0 mm	90%
31Tue	+10°C	+8°C	+10°C	10-14 m/s, SW	0.1 mm	82%

Weather highs and lows in Calais for december

Warmest day: 5 december, +13°C
Coldest night: 12 december, +4°C
Max precipitation: 8 december, 2.5 mm
Warmest water: 1 december, +12°C
Coldest water: 14 december, +10°C

Climate in Calais in december

Year: 2024
Average daytime temperature: +10°C
Average nighttime temperature: +7°C
Water temperature: —
Precipitation (month): 8 mm
Days with precipitation: 3
Humidity: 81%
Wind: 7 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

December	Day	Night	Sea t°	Wind	Precip	Humidity
1Fri	+5°C	+2°C	—	4-5 m/s, E	0 mm	73%
2Sat	+6°C	+1°C	—	4-5 m/s, NW	0 mm	68%
3Sun	+6°C	+1°C	—	8-10 m/s, S	0 mm	80%
4Mon	+9°C	+3°C	—	9-10 m/s, SSE	0.5 mm	87%
5Tue	+8°C	+6°C	—	7-9 m/s, NW	2 mm	89%
6Wed	+8°C	+5°C	—	5-7 m/s, NW	0.1 mm	68%
7Thu	+7°C	+5°C	—	8-10 m/s, SSE	0.4 mm	76%
8Fri	+11°C	+6°C	—	8-10 m/s, SW	0.1 mm	86%
9Sat	+13°C	+8°C	—	11-14 m/s, S	0.3 mm	86%
10Sun	+12°C	+9°C	—	12-14 m/s, SW	0.1 mm	84%
11Mon	+11°C	+10°C	—	10-14 m/s, W	0 mm	84%
12Tue	+12°C	+8°C	—	6-9 m/s, SSW	0.2 mm	90%
13Wed	+11°C	+8°C	—	8-10 m/s, NNW	0.3 mm	83%
14Thu	+9°C	+7°C	—	8-12 m/s, WNW	0.8 mm	80%
15Fri	+9°C	+8°C	—	4 m/s, WNW	0 mm	78%
16Sat	+11°C	+9°C	—	6-8 m/s, WSW	0.1 mm	84%
17Sun	+11°C	+8°C	—	8-9 m/s, SW	0 mm	85%
18Mon	+11°C	+10°C	—	10-11 m/s, SW	0 mm	86%
19Tue	+11°C	+9°C	—	10-13 m/s, SW	1.5 mm	94%
20Wed	+10°C	+7°C	—	9-10 m/s, W	0.1 mm	79%
21Thu	+12°C	+10°C	—	11-12 m/s, W	0.4 mm	84%
22Fri	+11°C	+9°C	—	10-12 m/s, WNW	0.3 mm	78%
23Sat	+11°C	+9°C	—	11 m/s, W	0 mm	82%
24Sun	+12°C	+11°C	—	14-15 m/s, WSW	0.3 mm	90%
25Mon	+12°C	+11°C	—	13-14 m/s, WSW	3.3 mm	93%
26Tue	+12°C	+8°C	—	9-13 m/s, W	0.2 mm	80%
27Wed	+11°C	+8°C	—	9-14 m/s, SSW	0.3 mm	81%
28Thu	+11°C	+10°C	—	14-15 m/s, SW	0.2 mm	81%
29Fri	+11°C	+9°C	—	13-14 m/s, WSW	0.9 mm	84%
30Sat	+11°C	+8°C	—	9-10 m/s, SSW	0.1 mm	82%
31Sun	+10°C	+8°C	—	13-14 m/s, WSW	5.2 mm	82%

Weather highs and lows in Calais for december

Warmest day: 9 december, +13°C
Coldest night: 2 december, +1°C
Max precipitation: 31 december, 5.2 mm
Warmest water: —
Coldest water: —

Climate in Calais in december

Year: 2023
Average daytime temperature: +10°C
Average nighttime temperature: +8°C
Water temperature: —
Precipitation (month): 17.7 mm
Days with precipitation: 4
Humidity: 82%
Wind: 9 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

December	Day	Night	Sea t°	Wind	Precip	Humidity
1Thu	+9°C	+6°C	—	4-5 m/s, E	0 mm	68%
2Fri	+8°C	+4°C	—	5-7 m/s, ENE	0 mm	78%
3Sat	+5°C	+3°C	—	7-8 m/s, ENE	0 mm	78%
4Sun	+5°C	+2°C	—	6 m/s, ENE	0 mm	81%
5Mon	+6°C	+4°C	—	3-5 m/s, E	0.2 mm	84%
6Tue	+7°C	+5°C	—	2-3 m/s, S	0.4 mm	84%
7Wed	+8°C	+5°C	—	5-6 m/s, N	0.1 mm	71%
8Thu	+5°C	+3°C	—	3-4 m/s, WNW	0 mm	72%
9Fri	+6°C	+2°C	—	3-4 m/s, S	3.3 mm	73%
10Sat	+5°C	+2°C	—	2-3 m/s, SW	0 mm	76%
11Sun	+4°C	+1°C	—	5 m/s, S	0.3 mm	93%
12Mon	+2°C	0°C	—	6 m/s, SE	0.1 mm	90%
13Tue	+2°C	-1°C	—	5-6 m/s, ESE	0 mm	74%
14Wed	+5°C	+1°C	—	4-5 m/s, ENE	0 mm	70%
15Thu	+7°C	+3°C	—	5 m/s, NE	0.1 mm	67%
16Fri	+5°C	+1°C	—	4-5 m/s, SE	0 mm	67%
17Sat	+3°C	-1°C	—	4-5 m/s, S	0 mm	73%
18Sun	+6°C	-1°C	—	5-6 m/s, SSE	0.6 mm	58%
19Mon	+12°C	+7°C	—	10-11 m/s, SSW	2.1 mm	86%
20Tue	+13°C	+9°C	—	9-11 m/s, SSW	0.1 mm	84%
21Wed	+11°C	+9°C	—	6-8 m/s, WSW	0.3 mm	79%
22Thu	+12°C	+9°C	—	7-8 m/s, SW	1.7 mm	89%
23Fri	+13°C	+11°C	—	9-12 m/s, WSW	1.4 mm	92%
24Sat	+11°C	+9°C	—	8-10 m/s, SW	0.1 mm	88%
25Sun	+11°C	+10°C	—	6-8 m/s, SSW	0.2 mm	91%
26Mon	+11°C	+7°C	—	9-11 m/s, WNW	0.1 mm	74%
27Tue	+9°C	+7°C	—	8-10 m/s, SSW	0.2 mm	76%
28Wed	+11°C	+8°C	—	12-13 m/s, SSW	0.9 mm	86%
29Thu	+11°C	+9°C	—	12-14 m/s, SW	1.2 mm	81%
30Fri	+14°C	+7°C	—	11-14 m/s, S	1.9 mm	84%
31Sat	+15°C	+12°C	—	13-14 m/s, SW	2.4 mm	86%

Weather highs and lows in Calais for december

Warmest day: 31 december, +15°C
Coldest night: 13 december, -1°C
Max precipitation: 9 december, 3.3 mm
Warmest water: —
Coldest water: —

Climate in Calais in december

Year: 2022
Average daytime temperature: +8°C
Average nighttime temperature: +5°C
Water temperature: —
Precipitation (month): 17.7 mm
Days with precipitation: 7
Humidity: 79%
Wind: 6 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

December	Day	Night	Sea t°	Wind	Precip	Humidity
1Wed	+12°C	+7°C	—	11-13 m/s, WNW	1.5 mm	79%
2Thu	+7°C	+5°C	—	9 m/s, NNW	0.1 mm	74%
3Fri	+7°C	+5°C	—	6-9 m/s, SSW	0.2 mm	77%
4Sat	+9°C	+6°C	—	6-9 m/s, WNW	0.5 mm	81%
5Sun	+9°C	+5°C	—	8-10 m/s, NNW	0.8 mm	78%
6Mon	+8°C	+4°C	—	5-7 m/s, SSW	1.6 mm	85%
7Tue	+7°C	+5°C	—	8-12 m/s, S	0.8 mm	74%
8Wed	+9°C	+6°C	—	10 m/s, SSW	0.9 mm	80%
9Thu	+9°C	+6°C	—	7-8 m/s, W	0.5 mm	73%
10Fri	+8°C	+6°C	—	11-12 m/s, NW	1.3 mm	82%
11Sat	+9°C	+6°C	—	6-9 m/s, W	0 mm	77%
12Sun	+12°C	+8°C	—	8 m/s, WSW	1.2 mm	94%
13Mon	+12°C	+8°C	—	5-6 m/s, S	0 mm	85%
14Tue	+11°C	+8°C	—	5-6 m/s, SW	0.1 mm	92%
15Wed	+12°C	+9°C	—	5 m/s, SW	0.3 mm	86%
16Thu	+13°C	+9°C	—	2 m/s, NNE	0 mm	86%
17Fri	+10°C	+7°C	—	4-6 m/s, ENE	0 mm	91%
18Sat	+9°C	+7°C	—	5-6 m/s, ENE	0 mm	93%
19Sun	+9°C	+7°C	—	4-7 m/s, NNW	0 mm	89%
20Mon	+9°C	+4°C	—	4-6 m/s, ENE	0.1 mm	71%
21Tue	+6°C	+2°C	—	3-4 m/s, E	0 mm	69%
22Wed	+5°C	0°C	—	4-5 m/s, SSE	0 mm	62%
23Thu	+10°C	+2°C	—	6-8 m/s, SSW	0 mm	72%
24Fri	+11°C	+9°C	—	6-8 m/s, SW	0.4 mm	92%
25Sat	+10°C	+4°C	—	5-7 m/s, E	1.9 mm	92%
26Sun	+9°C	+4°C	—	5-6 m/s, SE	0.3 mm	94%
27Mon	+10°C	+7°C	—	5-6 m/s, SE	0.4 mm	90%
28Tue	+11°C	+9°C	—	9-12 m/s, SW	4.1 mm	90%
29Wed	+12°C	+9°C	—	8-13 m/s, WSW	1.4 mm	92%
30Thu	+13°C	+11°C	—	10-11 m/s, SW	0.3 mm	92%
31Fri	+14°C	+11°C	—	9 m/s, SSW	0.1 mm	87%

Weather highs and lows in Calais for december

Warmest day: 31 december, +14°C
Coldest night: 22 december, 0°C
Max precipitation: 28 december, 4.1 mm
Warmest water: —
Coldest water: —

Climate in Calais in december

Year: 2021
Average daytime temperature: +10°C
Average nighttime temperature: +6°C
Water temperature: —
Precipitation (month): 18.8 mm
Days with precipitation: 7
Humidity: 83%
Wind: 6 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

December	Day	Night	Sea t°	Wind	Precip	Humidity
1Tue	+9°C	+7°C	—	10-11 m/s, NNW	0.2 mm	75%
2Wed	+10°C	+6°C	—	5-8 m/s, S	0 mm	82%
3Thu	+7°C	+5°C	—	7-11 m/s, S	2.9 mm	80%
4Fri	+7°C	+5°C	—	8-11 m/s, WSW	1.9 mm	86%
5Sat	+6°C	+3°C	—	6-7 m/s, SSE	0 mm	84%
6Sun	+5°C	+3°C	—	4-6 m/s, ESE	0.2 mm	84%
7Mon	+7°C	+4°C	—	2-4 m/s, NNW	0.1 mm	79%
8Tue	+5°C	+3°C	—	3-4 m/s, ESE	0 mm	72%
9Wed	+7°C	+5°C	—	3-4 m/s, SSW	0.9 mm	79%
10Thu	+6°C	+4°C	—	7 m/s, SE	0 mm	84%
11Fri	+10°C	+4°C	—	6-7 m/s, SSE	2.5 mm	91%
12Sat	+9°C	+8°C	—	5-8 m/s, WNW	0.4 mm	85%
13Sun	+8°C	+5°C	—	6-10 m/s, SSW	0.1 mm	80%
14Mon	+12°C	+9°C	—	9-10 m/s, SSW	0.1 mm	86%
15Tue	+11°C	+9°C	—	6-7 m/s, SW	0.1 mm	86%
16Wed	+10°C	+8°C	—	8-9 m/s, SSE	0 mm	84%
17Thu	+11°C	+8°C	—	7-8 m/s, SW	0.6 mm	80%
18Fri	+11°C	+9°C	—	8-9 m/s, S	0 mm	84%
19Sat	+12°C	+10°C	—	9 m/s, SSW	0 mm	82%
20Sun	+11°C	+9°C	—	8-9 m/s, SW	0.5 mm	79%
21Mon	+12°C	+8°C	—	9-11 m/s, S	1.5 mm	88%
22Tue	+13°C	+11°C	—	9-13 m/s, SW	0.8 mm	92%
23Wed	+12°C	+10°C	—	7-8 m/s, SW	2.3 mm	93%
24Thu	+9°C	+2°C	—	10-12 m/s, NNW	1.7 mm	78%
25Fri	+7°C	+5°C	—	9-11 m/s, NNW	1.7 mm	75%
26Sat	+9°C	+5°C	—	7-11 m/s, WSW	0.4 mm	76%
27Sun	+9°C	+5°C	—	12-18 m/s, WSW	3.9 mm	80%
28Mon	+5°C	+2°C	—	4-5 m/s, SSE	0.2 mm	83%
29Tue	+5°C	+1°C	—	4 m/s, W	0.1 mm	82%
30Wed	+5°C	+4°C	—	5-6 m/s, WNW	0 mm	80%
31Thu	+5°C	+1°C	—	5-6 m/s, SW	0 mm	94%

Weather highs and lows in Calais for december

Warmest day: 22 december, +13°C
Coldest night: 29 december, +1°C
Max precipitation: 27 december, 3.9 mm
Warmest water: —
Coldest water: —

Climate in Calais in december

Year: 2020
Average daytime temperature: +9°C
Average nighttime temperature: +6°C
Water temperature: —
Precipitation (month): 23.1 mm
Days with precipitation: 8
Humidity: 83%
Wind: 7 m/s

Weather in Calais in december by year

Year	Day	Night	Precipitation	Days with precipitation	Water
2025	+10°C	+7°C	7.2 mm	3	—
2024	+10°C	+7°C	8 mm	3	—
2023	+10°C	+8°C	17.7 mm	4	—
2022	+8°C	+5°C	17.7 mm	7	—
2021	+10°C	+6°C	18.8 mm	7	—
2020	+9°C	+6°C	23.1 mm	8	—

Comparison december in Calais with other months

Month	Day	Night	Days with precipitation	Sunny days
January	+8°C	+5°C	6	5
February	+9°C	+5°C	4	6
March	+10°C	+6°C	3	9
April	+11°C	+7°C	4	9
May	+14°C	+10°C	3	9
June	+18°C	+13°C	4	13
July	+19°C	+15°C	4	9
August	+20°C	+16°C	3	11
September	+19°C	+15°C	4	8
October	+16°C	+12°C	7	5
November	+12°C	+9°C	7	4
December	+9°C	+6°C	5	4