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December

Cayeux-sur-Mer Weather in December with Sea Temperature

December weather in Cayeux-sur-Mer includes average daytime air +9°C, nighttime +4°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	+8°C	+3°C	+12°C	5 m/s	0.1 mm	80%
2Tue	+8°C	+3°C	+12°C	5 m/s	0.4 mm	83%
3Wed	+6°C	+1°C	+12°C	5 m/s	0.3 mm	82%
4Thu	+7°C	+3°C	+12°C	5 m/s	1.1 mm	87%
5Fri	+8°C	+3°C	+12°C	5 m/s	0.7 mm	88%
6Sat	+8°C	+4°C	+12°C	5 m/s	0.2 mm	82%
7Sun	+8°C	+4°C	+12°C	6 m/s	0.7 mm	83%
8Mon	+8°C	+4°C	+11°C	5 m/s	0.4 mm	85%
9Tue	+9°C	+4°C	+11°C	5 m/s	0.2 mm	84%
10Wed	+8°C	+5°C	+11°C	6 m/s	0.4 mm	85%
11Thu	+8°C	+3°C	+11°C	5 m/s	0.7 mm	87%
12Fri	+8°C	+4°C	+11°C	4 m/s	0.8 mm	90%
13Sat	+7°C	+3°C	+11°C	3 m/s	0.1 mm	85%
14Sun	+8°C	+4°C	+11°C	4 m/s	0.1 mm	88%
15Mon	+10°C	+5°C	+11°C	3 m/s	0 mm	85%
16Tue	+9°C	+5°C	+11°C	4 m/s	0.1 mm	86%
17Wed	+8°C	+4°C	+11°C	3 m/s	0.2 mm	87%
18Thu	+10°C	+4°C	+11°C	6 m/s	0.6 mm	80%
19Fri	+11°C	+6°C	+11°C	6 m/s	1.1 mm	86%
20Sat	+9°C	+5°C	+11°C	5 m/s	0.9 mm	84%
21Sun	+10°C	+6°C	+11°C	6 m/s	0.9 mm	87%
22Mon	+10°C	+6°C	+10°C	6 m/s	1.1 mm	79%
23Tue	+10°C	+5°C	+10°C	6 m/s	0.8 mm	83%
24Wed	+9°C	+5°C	+10°C	6 m/s	0.5 mm	86%
25Thu	+9°C	+6°C	+10°C	5 m/s	0.4 mm	82%
26Fri	+8°C	+4°C	+10°C	4 m/s	0.1 mm	82%
27Sat	+8°C	+4°C	+10°C	5 m/s	0.8 mm	82%
28Sun	+8°C	+4°C	+10°C	6 m/s	0.3 mm	83%
29Mon	+9°C	+4°C	+10°C	5 m/s	0.4 mm	87%
30Tue	+10°C	+5°C	+10°C	6 m/s	0.4 mm	84%
31Wed	+10°C	+6°C	+10°C	6 m/s	0.3 mm	85%

Sea water temperature by months

Water +11°C

Day and night air temperature

Day +9°C Night +4°C

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 19 december, +11°C
Coldest night: 3 december, +1°C
Max precipitation: 4 december, 1.1 mm
Warmest sea water: 1 december, +12°C
Coldest sea water: 22 december, +10°C

Climate in Cayeux-sur-Mer in december

Average daytime temperature: +9°C
Average nighttime temperature: +4°C
Sea water temperature: —
Precipitation (monthly average): 15 mm
Days with precipitation: 5.5
Humidity: 84%
Wind: 5 m/s
Data: 6 years / coverage 100%

Daily air temperature for the month

Day Night

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December	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+7°C	+3°C	—	6-8 m/s, S	0 mm	76%
2Tue	+10°C	+6°C	—	7-11 m/s, SSW	0.7 mm	83%
3Wed	+9°C	+3°C	—	4-5 m/s, SSW	0 mm	85%
4Thu	+8°C	+4°C	—	5-7 m/s, WNW	1.5 mm	90%
5Fri	+8°C	+3°C	—	5-9 m/s, S	0.6 mm	85%
6Sat	+10°C	+8°C	—	10-11 m/s, SW	0 mm	82%
7Sun	+14°C	+9°C	—	8-10 m/s, S	1 mm	88%
8Mon	+14°C	+11°C	—	6-7 m/s, SSW	0.6 mm	88%
9Tue	+14°C	+10°C	—	7-8 m/s, S	0 mm	78%
10Wed	+13°C	+8°C	—	4-6 m/s, SW	0.1 mm	89%
11Thu	+11°C	+5°C	—	3-4 m/s, S	0 mm	90%
12Fri	+12°C	+9°C	—	3-4 m/s, SSW	0.4 mm	91%
13Sat	+11°C	+7°C	—	1 m/s, NNE	0 mm	88%
14Sun	+11°C	+5°C	—	3-4 m/s, S	0 mm	88%
15Mon	+11°C	+6°C	—	6-7 m/s, S	0 mm	85%
16Tue	+13°C	+9°C	—	5-6 m/s, SSE	0.1 mm	82%
17Wed	+10°C	+7°C	—	2-3 m/s, W	0 mm	89%
18Thu	+12°C	+8°C	—	9-12 m/s, S	2 mm	78%
19Fri	+12°C	+6°C	—	5-8 m/s, WSW	0.9 mm	84%
20Sat	+6°C	+4°C	—	2-3 m/s, ENE	0.5 mm	91%
21Sun	+10°C	+7°C	—	4-6 m/s, ESE	1.9 mm	93%
22Mon	+10°C	+5°C	—	3-4 m/s, ESE	0 mm	81%
23Tue	+7°C	+3°C	—	3-4 m/s, ENE	0 mm	83%
24Wed	+2°C	-2°C	—	8-9 m/s, NE	0 mm	77%
25Thu	+2°C	-2°C	—	8-9 m/s, ENE	0 mm	44%
26Fri	+3°C	-3°C	—	4-5 m/s, ENE	0 mm	66%
27Sat	+5°C	-2°C	—	4-5 m/s, ENE	0 mm	70%
28Sun	+6°C	-1°C	—	4-5 m/s, NE	0 mm	92%
29Mon	+6°C	-2°C	—	3-4 m/s, NE	0 mm	85%
30Tue	+6°C	-1°C	—	5-7 m/s, NE	0 mm	68%
31Wed	+5°C	0°C	—	2 m/s, NNW	0 mm	86%

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 7 december, +14°C
Coldest night: 26 december, -3°C
Max precipitation: 18 december, 2 mm
Warmest water: —
Coldest water: —

Climate in Cayeux-sur-Mer in december

Year: 2025
Average daytime temperature: +9°C
Average nighttime temperature: +4°C
Water temperature: —
Precipitation (month): 10.3 mm
Days with precipitation: 4
Humidity: 82%
Wind: 5 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	+4°C	+12°C	5 m/s, S	0 mm	82%
2Mon	+11°C	+6°C	+12°C	6-7 m/s, WSW	1.7 mm	85%
3Tue	+8°C	+3°C	+12°C	3-4 m/s, NNW	0 mm	79%
4Wed	+8°C	+3°C	+12°C	3-4 m/s, SSW	0 mm	88%
5Thu	+12°C	+6°C	+12°C	7-8 m/s, SSW	0.3 mm	88%
6Fri	+11°C	+5°C	+12°C	7-10 m/s, NW	0 mm	73%
7Sat	+12°C	+6°C	+12°C	10-12 m/s, WSW	1 mm	84%
8Sun	+8°C	+4°C	+11°C	9-11 m/s, N	1.1 mm	88%
9Mon	+7°C	+4°C	+11°C	7-8 m/s, NNE	0 mm	81%
10Tue	+6°C	+5°C	+11°C	7 m/s, NE	0 mm	84%
11Wed	+5°C	0°C	+11°C	4-5 m/s, ENE	0 mm	83%
12Thu	+5°C	0°C	+11°C	3 m/s, E	0 mm	86%
13Fri	+5°C	0°C	+11°C	2 m/s, SE	0 mm	86%
14Sat	+6°C	+1°C	+11°C	3-4 m/s, SW	0 mm	87%
15Sun	+11°C	+4°C	+11°C	4-5 m/s, WSW	0.1 mm	92%
16Mon	+11°C	+8°C	+11°C	6 m/s, WSW	0.2 mm	90%
17Tue	+9°C	+6°C	+11°C	4-5 m/s, S	0.1 mm	90%
18Wed	+14°C	+8°C	+11°C	7-9 m/s, SW	0 mm	79%
19Thu	+14°C	+4°C	+11°C	8-11 m/s, NW	2 mm	78%
20Fri	+8°C	+3°C	+11°C	4-6 m/s, WSW	0 mm	80%
21Sat	+12°C	+6°C	+11°C	7-11 m/s, WSW	0.7 mm	89%
22Sun	+8°C	+5°C	+10°C	9-10 m/s, WNW	1.5 mm	70%
23Mon	+6°C	+3°C	+10°C	6-9 m/s, NNW	0 mm	75%
24Tue	+10°C	+5°C	+10°C	2-3 m/s, SSW	0 mm	94%
25Wed	+12°C	+10°C	+10°C	2 m/s, W	0 mm	93%
26Thu	+12°C	+7°C	+10°C	2 m/s, E	0 mm	88%
27Fri	+9°C	+4°C	+10°C	2 m/s, ESE	0 mm	84%
28Sat	+7°C	+1°C	+10°C	2 m/s, SE	0 mm	64%
29Sun	+9°C	+2°C	+10°C	2 m/s, WSW	0 mm	90%
30Mon	+8°C	+3°C	+10°C	3 m/s, SW	0 mm	92%
31Tue	+9°C	+3°C	+10°C	5-8 m/s, SW	0 mm	82%

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 18 december, +14°C
Coldest night: 11 december, 0°C
Max precipitation: 19 december, 2 mm
Warmest water: 1 december, +12°C
Coldest water: 22 december, +10°C

Climate in Cayeux-sur-Mer in december

Year: 2024
Average daytime temperature: +9°C
Average nighttime temperature: +4°C
Water temperature: —
Precipitation (month): 8.7 mm
Days with precipitation: 5
Humidity: 84%
Wind: 5 m/s

Daily air temperature for the month

Day Night

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December	Day	Night	Sea t°	Wind	Precip	Humidity
1Fri	+4°C	-2°C	—	3 m/s, ENE	0 mm	85%
2Sat	+5°C	-2°C	—	2 m/s, WSW	0 mm	80%
3Sun	+3°C	-1°C	—	6-8 m/s, S	0.1 mm	72%
4Mon	+7°C	+1°C	—	7-9 m/s, SSE	1.9 mm	86%
5Tue	+8°C	+5°C	—	5-6 m/s, WNW	1 mm	92%
6Wed	+7°C	+3°C	—	2-4 m/s, W	0 mm	76%
7Thu	+6°C	+3°C	—	6-8 m/s, SSE	0.5 mm	78%
8Fri	+10°C	+5°C	—	5-6 m/s, SW	0.8 mm	88%
9Sat	+13°C	+6°C	—	8-11 m/s, S	0.6 mm	90%
10Sun	+12°C	+8°C	—	9-11 m/s, SSW	0.2 mm	84%
11Mon	+12°C	+8°C	—	7-9 m/s, W	0.9 mm	88%
12Tue	+11°C	+7°C	—	4-5 m/s, SW	2 mm	90%
13Wed	+9°C	+7°C	—	5-7 m/s, W	0.7 mm	85%
14Thu	+8°C	+6°C	—	5-8 m/s, NW	0 mm	84%
15Fri	+9°C	+5°C	—	2-4 m/s, WNW	0 mm	88%
16Sat	+9°C	+5°C	—	3 m/s, WSW	0 mm	88%
17Sun	+9°C	+4°C	—	3-4 m/s, SSW	0 mm	87%
18Mon	+9°C	+2°C	—	4 m/s, SW	0 mm	82%
19Tue	+10°C	+6°C	—	6-8 m/s, SW	1.9 mm	93%
20Wed	+9°C	+6°C	—	5-6 m/s, WNW	0 mm	84%
21Thu	+11°C	+10°C	—	10-11 m/s, W	0.4 mm	88%
22Fri	+11°C	+8°C	—	10-12 m/s, WNW	0.7 mm	80%
23Sat	+11°C	+8°C	—	8-9 m/s, W	0.1 mm	84%
24Sun	+12°C	+9°C	—	10 m/s, WSW	0.7 mm	83%
25Mon	+13°C	+11°C	—	9 m/s, WSW	1.3 mm	86%
26Tue	+11°C	+7°C	—	5-8 m/s, W	0.2 mm	82%
27Wed	+11°C	+8°C	—	6-8 m/s, SSW	0.7 mm	81%
28Thu	+11°C	+8°C	—	8-9 m/s, SW	0 mm	78%
29Fri	+11°C	+8°C	—	9-10 m/s, WSW	0.2 mm	82%
30Sat	+10°C	+6°C	—	7-8 m/s, SSW	0.3 mm	86%
31Sun	+10°C	+6°C	—	10-11 m/s, SW	0.7 mm	82%

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 9 december, +13°C
Coldest night: 1 december, -2°C
Max precipitation: 12 december, 2 mm
Warmest water: —
Coldest water: —

Climate in Cayeux-sur-Mer in december

Year: 2023
Average daytime temperature: +9°C
Average nighttime temperature: +6°C
Water temperature: —
Precipitation (month): 15.9 mm
Days with precipitation: 5
Humidity: 84%
Wind: 6 m/s

Daily air temperature for the month

Day Night

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December	Day	Night	Sea t°	Wind	Precip	Humidity
1Thu	+8°C	+3°C	—	2-4 m/s, NE	0 mm	82%
2Fri	+6°C	+1°C	—	4-5 m/s, ENE	0 mm	87%
3Sat	+1°C	0°C	—	5-6 m/s, ENE	0 mm	85%
4Sun	+4°C	0°C	—	4-5 m/s, ENE	0 mm	83%
5Mon	+5°C	-1°C	—	3-4 m/s, NE	0.1 mm	90%
6Tue	+6°C	+1°C	—	2 m/s, E	0 mm	88%
7Wed	+6°C	+2°C	—	2 m/s, NW	0 mm	86%
8Thu	+5°C	0°C	—	1-2 m/s, WNW	0 mm	76%
9Fri	+4°C	-2°C	—	2 m/s, E	0 mm	82%
10Sat	+4°C	-2°C	—	2 m/s, ESE	0.1 mm	82%
11Sun	+1°C	-1°C	—	3 m/s, SW	0.6 mm	84%
12Mon	+1°C	-4°C	—	4-5 m/s, SE	0.1 mm	91%
13Tue	-1°C	-5°C	—	4-6 m/s, ESE	0 mm	82%
14Wed	0°C	-2°C	—	3-4 m/s, NE	0 mm	93%
15Thu	+4°C	-2°C	—	2 m/s, ENE	0 mm	68%
16Fri	+3°C	-4°C	—	2 m/s, ENE	0 mm	80%
17Sat	+1°C	-3°C	—	3-4 m/s, SE	0 mm	77%
18Sun	+5°C	-3°C	—	5-6 m/s, SE	1.4 mm	62%
19Mon	+11°C	+6°C	—	9 m/s, SSW	1.9 mm	84%
20Tue	+13°C	+9°C	—	7-9 m/s, SSW	5.1 mm	85%
21Wed	+9°C	+7°C	—	5-6 m/s, WSW	0.5 mm	88%
22Thu	+12°C	+8°C	—	5-7 m/s, SW	2.6 mm	91%
23Fri	+14°C	+10°C	—	7-9 m/s, WSW	1.9 mm	89%
24Sat	+11°C	+8°C	—	6-8 m/s, SW	0.6 mm	89%
25Sun	+12°C	+9°C	—	5-6 m/s, S	0.3 mm	92%
26Mon	+9°C	+5°C	—	6-7 m/s, WNW	0.1 mm	77%
27Tue	+7°C	+3°C	—	6-7 m/s, SSW	0 mm	81%
28Wed	+11°C	+7°C	—	8-10 m/s, SSW	0.3 mm	84%
29Thu	+11°C	+6°C	—	8-10 m/s, SW	0.4 mm	82%
30Fri	+14°C	+5°C	—	8-11 m/s, S	1.4 mm	87%
31Sat	+16°C	+14°C	—	10-12 m/s, SSW	0.6 mm	79%

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 31 december, +16°C
Coldest night: 13 december, -5°C
Max precipitation: 20 december, 5.1 mm
Warmest water: —
Coldest water: —

Climate in Cayeux-sur-Mer in december

Year: 2022
Average daytime temperature: +7°C
Average nighttime temperature: +2°C
Water temperature: —
Precipitation (month): 18 mm
Days with precipitation: 6
Humidity: 83%
Wind: 5 m/s

Daily air temperature for the month

Day Night

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December	Day	Night	Sea t°	Wind	Precip	Humidity
1Wed	+10°C	+6°C	—	8-10 m/s, WNW	0.2 mm	76%
2Thu	+6°C	+2°C	—	6-7 m/s, NNW	0 mm	76%
3Fri	+6°C	+1°C	—	5-6 m/s, SSW	0.9 mm	84%
4Sat	+7°C	+4°C	—	4-7 m/s, WNW	1.8 mm	85%
5Sun	+7°C	+3°C	—	5-6 m/s, NW	2.2 mm	84%
6Mon	+6°C	+3°C	—	5-10 m/s, S	0.9 mm	86%
7Tue	+6°C	+2°C	—	6-9 m/s, S	1.7 mm	76%
8Wed	+6°C	+3°C	—	7-8 m/s, SSW	0 mm	85%
9Thu	+8°C	+3°C	—	5-7 m/s, W	0.7 mm	86%
10Fri	+7°C	+5°C	—	9-10 m/s, NW	1.9 mm	80%
11Sat	+8°C	+4°C	—	5-7 m/s, WNW	0 mm	82%
12Sun	+12°C	+6°C	—	5-6 m/s, WSW	1.3 mm	90%
13Mon	+12°C	+6°C	—	3-4 m/s, SSE	0 mm	83%
14Tue	+10°C	+6°C	—	2-3 m/s, WSW	0 mm	90%
15Wed	+12°C	+7°C	—	2 m/s, NW	0 mm	90%
16Thu	+11°C	+6°C	—	2 m/s, ENE	0 mm	91%
17Fri	+10°C	+5°C	—	3-4 m/s, ENE	0 mm	92%
18Sat	+9°C	+5°C	—	5 m/s, ENE	0 mm	91%
19Sun	+8°C	+5°C	—	3-4 m/s, NNE	0 mm	92%
20Mon	+7°C	+3°C	—	4-5 m/s, ENE	0 mm	79%
21Tue	+5°C	-1°C	—	3 m/s, E	0 mm	75%
22Wed	+5°C	-2°C	—	3-4 m/s, SE	0 mm	66%
23Thu	+8°C	0°C	—	4-5 m/s, S	0 mm	77%
24Fri	+11°C	+8°C	—	4-5 m/s, SW	0.9 mm	94%
25Sat	+10°C	+7°C	—	3-5 m/s, SE	0.6 mm	94%
26Sun	+10°C	+7°C	—	3-4 m/s, SW	0.2 mm	92%
27Mon	+10°C	+7°C	—	4-5 m/s, SE	0.7 mm	92%
28Tue	+11°C	+9°C	—	8-11 m/s, WSW	1.5 mm	91%
29Wed	+14°C	+9°C	—	8-11 m/s, WSW	1.2 mm	92%
30Thu	+15°C	+12°C	—	7-8 m/s, SW	0.4 mm	86%
31Fri	+15°C	+10°C	—	5-6 m/s, S	0 mm	88%

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 30 december, +15°C
Coldest night: 22 december, -2°C
Max precipitation: 5 december, 2.2 mm
Warmest water: —
Coldest water: —

Climate in Cayeux-sur-Mer in december

Year: 2021
Average daytime temperature: +9°C
Average nighttime temperature: +5°C
Water temperature: —
Precipitation (month): 17.1 mm
Days with precipitation: 7
Humidity: 85%
Wind: 5 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	+8°C	+5°C	—	7-8 m/s, NNW	0.5 mm	81%
2Wed	+8°C	+5°C	—	3-6 m/s, NE	0 mm	88%
3Thu	+6°C	+2°C	—	5-7 m/s, SSW	0.8 mm	86%
4Fri	+6°C	+3°C	—	6-7 m/s, WSW	1.3 mm	90%
5Sat	+5°C	+2°C	—	4-5 m/s, SSE	0.2 mm	87%
6Sun	+5°C	+2°C	—	4-6 m/s, ESE	0 mm	87%
7Mon	+5°C	+1°C	—	2 m/s, SSW	0 mm	88%
8Tue	+4°C	+1°C	—	2-3 m/s, NE	0 mm	84%
9Wed	+5°C	+1°C	—	3 m/s, SSW	0.1 mm	89%
10Thu	+5°C	+3°C	—	5-6 m/s, SE	0 mm	88%
11Fri	+10°C	+3°C	—	5 m/s, SSW	2.9 mm	93%
12Sat	+9°C	+6°C	—	4-6 m/s, WNW	0.7 mm	92%
13Sun	+6°C	+3°C	—	5-8 m/s, S	0.1 mm	86%
14Mon	+11°C	+8°C	—	7-8 m/s, SSW	0.7 mm	87%
15Tue	+10°C	+7°C	—	4-5 m/s, SW	0.1 mm	89%
16Wed	+9°C	+6°C	—	5-7 m/s, SSE	0 mm	86%
17Thu	+9°C	+6°C	—	4-5 m/s, SW	0.8 mm	88%
18Fri	+10°C	+6°C	—	6-7 m/s, S	0.1 mm	86%
19Sat	+11°C	+8°C	—	7-8 m/s, SSW	0 mm	84%
20Sun	+9°C	+6°C	—	5-6 m/s, SW	0 mm	86%
21Mon	+12°C	+5°C	—	7-10 m/s, S	2 mm	90%
22Tue	+14°C	+10°C	—	7-10 m/s, SW	1.5 mm	88%
23Wed	+13°C	+8°C	—	6-7 m/s, SW	2.6 mm	91%
24Thu	+8°C	+2°C	—	7-9 m/s, NNW	0.9 mm	81%
25Fri	+5°C	+1°C	—	5-7 m/s, NNW	0 mm	84%
26Sat	+5°C	0°C	—	5-9 m/s, SW	0 mm	86%
27Sun	+7°C	+3°C	—	9-13 m/s, WSW	3.3 mm	84%
28Mon	+4°C	+1°C	—	5-6 m/s, SSE	0.2 mm	90%
29Tue	+5°C	+1°C	—	2-3 m/s, WSW	0.7 mm	90%
30Wed	+5°C	+2°C	—	3-4 m/s, WNW	0 mm	87%
31Thu	+4°C	0°C	—	4 m/s, NNW	0.4 mm	91%

Weather highs and lows in Cayeux-sur-Mer for december

Warmest day: 22 december, +14°C
Coldest night: 26 december, 0°C
Max precipitation: 27 december, 3.3 mm
Warmest water: —
Coldest water: —

Climate in Cayeux-sur-Mer in december

Year: 2020
Average daytime temperature: +8°C
Average nighttime temperature: +4°C
Water temperature: —
Precipitation (month): 19.9 mm
Days with precipitation: 6
Humidity: 87%
Wind: 5 m/s

Weather in Cayeux-sur-Mer in december by year

Year	Day	Night	Precipitation	Days with precipitation	Water
2025	+9°C	+4°C	10.3 mm	4	—
2024	+9°C	+4°C	8.7 mm	5	—
2023	+9°C	+6°C	15.9 mm	5	—
2022	+7°C	+2°C	18 mm	6	—
2021	+9°C	+5°C	17.1 mm	7	—
2020	+8°C	+4°C	19.9 mm	6	—

Comparison december in Cayeux-sur-Mer with other months

Month	Day	Night	Days with precipitation	Sunny days
January	+7°C	+2°C	7	7
February	+9°C	+4°C	5	6
March	+12°C	+4°C	4	9
April	+14°C	+5°C	3	9
May	+17°C	+8°C	3	8
June	+21°C	+12°C	4	10
July	+23°C	+14°C	4	11
August	+24°C	+14°C	4	12
September	+21°C	+13°C	5	9
October	+16°C	+10°C	7	7
November	+12°C	+7°C	5	5
December	+9°C	+4°C	5	4