Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
With the advent of December, Cayeux-sur-Mer's high-temperatures adjust to a frosty 7.4°C (45.3°F), closely aligning with the preceding month. The month of December in Cayeux-sur-Mer shows a minor drop from daytime temperatures, generally recording a low average of 3.6°C (38.5°F).Humidity
January, November and December, with an average relative humidity of 87%, are the most humid months in Cayeux-sur-Mer.Rainfall
The month with the most rainfall in Cayeux-sur-Mer is December, when the rain falls for 16.5 days and typically aggregates up to 71mm (2.8") of precipitation.Snowfall
January through March, November and December are months with snowfall. In Cayeux-sur-Mer, during December, snow falls for 2.2 days and regularly aggregates up to 22mm (0.87") of snow. In Cayeux-sur-Mer, during the entire year, snow falls for 9.6 days and aggregates up to 71mm (2.8") of snow.Sea temperature
In Cayeux-sur-Mer, in December, the average water temperature is 11.4°C (52.5°F).Note: Diving into 11.4°C (52.5°F) is practical below 10°C (50°F), given you're wearing protective swim gear; without it, expect a quick onset of cold shock and a struggle to breathe. Merely touching waters at 13°C (55.4°F) feels ice-cold.
Daylight
The month with the shortest days is December, with an average of 8h and 6min of daylight.On the first day of the month, sunrise is at 08:32 and sunset at 16:54. On the last day of December, in Cayeux-sur-Mer, sunrise is at 08:53 and sunset at 17:01 CET.
Sunshine
In December, the average sunshine in Cayeux-sur-Mer is 4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Cayeux-sur-Mer. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a daily UV index of 2 turns into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Frequently asked questions
What are December temperatures in Cayeux-sur-Mer?
What are the most humid months in Cayeux-sur-Mer?
What is the average humidity in December in Cayeux-sur-Mer?
What is the wettest month in Cayeux-sur-Mer?
How many days does it rain in December in Cayeux-sur-Mer?
How many days does it snow in December in Cayeux-sur-Mer?
What is the water temperature in December in Cayeux-sur-Mer?
What is the month with the shortest days in Cayeux-sur-Mer?
What is the average length of the day in December in Cayeux-sur-Mer?
When are sunrise and sunset in December in Cayeux-sur-Mer?
How long on average sun shines in December in Cayeux-sur-Mer?
What are the months with the lowest UV index in Cayeux-sur-Mer?
How high is the UV index in December in Cayeux-sur-Mer?
Average temperature in December
Cayeux-sur-Mer, France
- Average high temperature in December: 7.4°C
The warmest month (with the highest average high temperature) is August (21.7°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in December: 3.6°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in December
Cayeux-sur-Mer, France
- Average pressure in December: 1016.6mbar
The month with the highest atmospheric pressure is September (1017.7mbar).
The month with the lowest atmospheric pressure is November (1012.2mbar).
Average wind speed in December
Cayeux-sur-Mer, France
- Average wind speed in December: 20.3km/h
The windiest month (with the highest average wind speed) is December (20.3km/h).
The calmest month (with the lowest average wind speed) is August (13.4km/h).
Average humidity in December
Cayeux-sur-Mer, France
- Average humidity in December: 87%
The months with the highest relative humidity are January, November and December (87%).
The month with the lowest relative humidity is August (78%).
Average rainfall in December
Cayeux-sur-Mer, France
- Average rainfall in December: 71mm
The wettest month (with the highest rainfall) is December (71mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in December
Cayeux-sur-Mer, France
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is April (13.5 days).
Average snowfall in December
Cayeux-sur-Mer, France
- Average snowfall in December: 22mm
The month with the highest snowfall is January (29mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Cayeux-sur-Mer, France
- Average snowfall days in December: 2.2 days
The month with the highest number of snowfall days is February (3.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Cayeux-sur-Mer, France
- Average sea temperature in December: 11.4°C
The best months for swimming (with the highest average sea temperature) are August and September (17.8°C).
The coldest month (with the lowest average sea temperature) is March (7.9°C).
Average daylight in December /
Average sunshine in December
Cayeux-sur-Mer, France
- Average daylight in December: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Cayeux-sur-Mer, France
- Average sunshine days in December: 11.1 days
The months with the most sunshine days are March and April (13.7 days).
The month with the least sunshine days is November (10.1 days).
Average UV index in December
Cayeux-sur-Mer, France
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Cayeux-sur-Mer, France
- Average cloud cover in December: 59
The months with the most cloud cover are January, November and December (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 40).
Average visibility in December
Cayeux-sur-Mer, France
- Average visibility in December: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Cayeux-sur-Mer, France
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