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
The arrival of December is marked by an average high-temperature of a still fresh 10.6°C (51.1°F), bearing a close resemblance to November. A minimal decline in temperature from daytime highs is anticipated throughout the December nights, averaging a frosty 7.2°C (45°F).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 84%.Rainfall
In December, in Riantec, the rain falls for 17.8 days. Throughout December, 81mm (3.19") of precipitation is accumulated. In Riantec, France, during the entire year, the rain falls for 176.7 days and collects up to 625mm (24.61") of precipitation.Snowfall
Months with snowfall in Riantec are January, February, April and December. December is the first month it typically snows in Riantec. Throughout December, in the average 0.6 snowfall days, it receives 1mm (0.04") of snow. In Riantec, France, during the entire year, snow falls for 2.4 days and aggregates up to 8mm (0.31") of snow.Sea temperature
In December, the average sea temperature is 12.6°C (54.7°F).Note: Caution: 12.6°C (54.7°F) temperatures below 10°C (50°F) during swimming can result in intense cold shock and quickened breathing.
Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 08:41 and sunset at 17:23. On the last day of December, sunrise is at 09:01 and sunset at 17:31 CET.
Sunshine
January and December, with an average of 3.9h of sunshine, are months with the least sunshine in Riantec.UV index
In Riantec, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 3 during December leads to these advisories:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the average December temperature in Riantec?
What are the most humid months in Riantec?
What is the average humidity in December in Riantec?
How much does it rain in Riantec in December?
When does it start snowing in Riantec?
What is the water temperature in December in Riantec?
What is the month with the shortest days in Riantec?
What is the average length of the day in December in Riantec?
What time are sunrise and sunset in December in Riantec?
What are the months with the least sunshine in Riantec?
How many hours of sunshine does Riantec have in December?
What is the UV index reading in December in Riantec?
Average temperature in December
Riantec, France
- Average high temperature in December: 10.6°C
The warmest months (with the highest average high temperature) are July and August (20.8°C).
The months with the lowest average high temperature are January and February (9.3°C).
- Average low temperature in December: 7.2°C
The month with the highest average low temperature is July (14.3°C).
The coldest month (with the lowest average low temperature) is February (5.3°C).
Average pressure in December
Riantec, France
- Average pressure in December: 1018.3mbar
The month with the highest atmospheric pressure is September (1018.5mbar).
The month with the lowest atmospheric pressure is November (1012.8mbar).
Average wind speed in December
Riantec, France
- Average wind speed in December: 21.6km/h
The windiest months (with the highest average wind speed) are January, February and December (21.6km/h).
The calmest month (with the lowest average wind speed) is August (14.9km/h).
Average humidity in December
Riantec, 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 April, July and September (79%).
Average rainfall in December
Riantec, France
- Average rainfall in December: 81mm
The wettest month (with the highest rainfall) is November (86mm).
The driest month (with the least rainfall) is July (27mm).
Average rainfall days in December
Riantec, France
- Average rainfall days in December: 17.8 days
The month with the highest number of rainy days is December (17.8 days).
The month with the least rainy days is September (11.1 days).
Average snowfall in December
Riantec, France
- Average snowfall in December: 1mm
The month with the highest snowfall is February (4mm).
The months with the least snowfall are March, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Riantec, France
- Average snowfall days in December: 0.6 days
The month with the highest number of snowfall days is February (1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Riantec, France
- Average sea temperature in December: 12.6°C
The best month for swimming (with the highest average sea temperature) is August (17.9°C).
The coldest month (with the lowest average sea temperature) is February (9.9°C).
Average daylight in December /
Average sunshine in December
Riantec, France
- Average daylight in December: 8h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 3h and 54min).
Average sunshine days in December
Riantec, France
- Average sunshine days in December: 10.9 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is November (8.5 days).
Average UV index in December
Riantec, France
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in December
Riantec, France
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 36).
Average visibility in December
Riantec, France
- Average visibility in December: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September and November (10km).
The months with the lowest visibility are January, October and December (9km).
Riantec, France
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