December weather forecastRoyan, France

December

Weather in December

December, the first month of the winter in Royan, is still a cool month, with temperature in the range of an average high of 10.5°C (50.9°F) and an average low of 5.6°C (42.1°F).

Temperature

The shift into December uncovers an average high-temperature of a fresh 10.5°C (50.9°F), subtly different from the previous month. An average nighttime temperature of 5.6°C (42.1°F) marks December.

Humidity

January and December, with an average relative humidity of 84%, are the most humid months.

Rainfall

In December, the rain falls for 15.4 days. Throughout December, 60mm (2.36") of precipitation is accumulated. In Royan, France, during the entire year, the rain falls for 161.7 days and collects up to 495mm (19.49") of precipitation.

Snowfall

Months with snowfall are January through March and December. The months with the most snowfall are March and December, with an average 4mm (0.16") of accumulated snow.

Sea temperature

In December, the average sea temperature is 13.3°C (55.9°F).
Note: Swimming in 13.3°C (55.9°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.

Daylight

The month with the shortest days is December, with an average of 8h and 48min of daylight.
On the first day of December, sunrise is at 08:24 and sunset at 17:22. On the last day of the month, sunrise is at 08:44 and sunset at 17:30 CET.

Sunshine

January and December, with an average of 4.8h of sunshine, are months with the least sunshine.

UV index

January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum daily UV index, 3 in December, converts into the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.

Updated: Jul 3, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In December, in Royan, the average high-temperature is 10.5°C (50.9°F), and the average low-temperature is 5.6°C (42.1°F).

January and December, with an average relative humidity of 84%, are most humid months.

The average relative humidity in December is 84%.

In Royan, in December, it is raining for 15.4 days, with typically 60mm (2.36") of accumulated precipitation.

The months with the most snowfall are March and December, with an average 4mm (0.16") of accumulated snow.

December is the first month it typically snows. Throughout December, in the average 0.5 snowfall days, it receives 4mm (0.16") of snow.

In Royan, the average seawater temperature in December is 13.3°C (55.9°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

December has the shortest days of the year, with an average of 8h and 48min of daylight.

The average day length in December is 8h and 46min.

On the first day of December, sunrise is at 08:24 and sunset at 17:22. On the last day of the month, sunrise is at 08:44 and sunset at 17:30 CET.

The months with the least sunshine are January and December, with an average of 4.8h of sunshine.

The average sunshine duration in December is 4.8h.

January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index.

In Royan, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

13.2°C

10.5°C

9.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

16.8km/h

17.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.5

0.3

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

11.7

13.5

12.2

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Royan, France

Average high temperature in December: 10.5°C

The warmest month (with the highest average high temperature) is August (25.7°C).
The month with the lowest average high temperature is January (9.1°C).

Average low temperature in December: 5.6°C

The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is February (3.8°C).

Average pressure in December
Royan, France

Average pressure in December: 1020.3mbar

The month with the highest atmospheric pressure is December (1020.3mbar).
The month with the lowest atmospheric pressure is November (1014.4mbar).

Average wind speed in December
Royan, France

Average wind speed in December: 16km/h

The windiest month (with the highest average wind speed) is February (17km/h).
The calmest month (with the lowest average wind speed) is August (11.3km/h).

Average humidity in December
Royan, France

Average humidity in December: 84%

The months with the highest relative humidity are January and December (84%).
The months with the lowest relative humidity are August and September (70%).

Average rainfall in December
Royan, France

Average rainfall in December: 60mm

The wettest month (with the highest rainfall) is November (80mm).
The driest month (with the least rainfall) is July (21mm).

Average rainfall days in December
Royan, France

Average rainfall days in December: 15.4 days

The month with the highest number of rainy days is November (16.1 days).
The month with the least rainy days is September (9.5 days).

Average snowfall in December
Royan, France

Average snowfall in December: 4mm

The months with the highest snowfall are March and December (4mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

Average snowfall days in December
Royan, France

Average snowfall days in December: 0.5 days

The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

Average sea temperature in December
Royan, France

Average sea temperature in December: 13.3°C

The best month for swimming (with the highest average sea temperature) is August (19.9°C).
The coldest month (with the lowest average sea temperature) is February (9.8°C).

Average daylight in December /
Average sunshine in December
Royan, France

Average daylight in December: 8h and 48min

The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).

Average sunshine in December: 4h and 48min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).

Average sunshine days in December
Royan, France

Average sunshine days in December: 13.5 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is November (11.7 days).

Average UV index in December
Royan, France

Average UV index in December: 3

The months with the highest UV index are May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 3).

Average cloud cover in December
Royan, France

Average cloud cover in December: 49

The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in December
Royan, France

Average visibility in December: 9km

The months with the highest visibility are March, July, August and September (10km).
The months with the lowest visibility are January, February, April, May, June, October, November and December (9km).