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
December
Weather in December
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Royan in December?
What are the most humid months?
What is the average humidity in December?
How much does it rain in December?
What is the snowiest month?
When does it start snowing?
How cold is the water in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What are the months with the least sunshine?
How many hours of sunshine does Royan have in December?
When is the lowest UV index?
How high is the UV index in December?
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 5min
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 5min
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).
