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 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
As December begins, there is a minor decrease in the average high-temperature, softly falling from a fresh 10.3°C (50.5°F) in November to a frosty 6.8°C (44.2°F). Val-de-Mercy experiences an average nighttime temperature of 2.1°C (35.8°F) in December, reflecting a minor difference from the day's peak.Humidity
The most humid month in Val-de-Mercy is December, with an average relative humidity of 88%.Rainfall
In Val-de-Mercy, in December, it is raining for 14.5 days, with typically 49mm (1.93") of accumulated precipitation. Throughout the year, in Val-de-Mercy, there are 162.5 rainfall days, and 468mm (18.43") of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Val-de-Mercy, during December, snow falls for 2.4 days and regularly aggregates up to 19mm (0.75") of snow. Throughout the year, in Val-de-Mercy, there are 9.1 snowfall days, and 65mm (2.56") of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 08:13 and sunset at 16:56. On the last day of December, in Val-de-Mercy, sunrise is at 08:33 and sunset at 17:03 CET.
Sunshine
In Val-de-Mercy, the average sunshine in December is 4h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. To cut down UV radiation exposure by about half, sport a wide-brim hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
Is December cold in Val-de-Mercy?
What is the most humid month in Val-de-Mercy?
What is the average humidity in December in Val-de-Mercy?
How many days does it rain in December in Val-de-Mercy?
How much does it snow in Val-de-Mercy in December?
What is the month with the shortest days in Val-de-Mercy?
What is the average length of the day in December in Val-de-Mercy?
What time are sunrise and sunset in December in Val-de-Mercy?
How many hours of sunshine does Val-de-Mercy have in December?
When is the lowest UV index in Val-de-Mercy?
How high is the UV index in December in Val-de-Mercy?
Average temperature in December
Val-de-Mercy, France
- Average high temperature in December: 6.8°C
The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (5.7°C).
- Average low temperature in December: 2.1°C
The month with the highest average low temperature is July (14.1°C).
The coldest month (with the lowest average low temperature) is January (0.8°C).
Average pressure in December
Val-de-Mercy, France
- Average pressure in December: 1019.7mbar
The month with the highest atmospheric pressure is December (1019.7mbar).
The month with the lowest atmospheric pressure is November (1014.5mbar).
Average wind speed in December
Val-de-Mercy, France
- Average wind speed in December: 14.9km/h
The windiest month (with the highest average wind speed) is February (15.4km/h).
The calmest month (with the lowest average wind speed) is August (9.6km/h).
Average humidity in December
Val-de-Mercy, France
- Average humidity in December: 88%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (71%).
Average rainfall in December
Val-de-Mercy, France
- Average rainfall in December: 49mm
The wettest month (with the highest rainfall) is May (56mm).
The driest month (with the least rainfall) is September (25mm).
Average rainfall days in December
Val-de-Mercy, France
- Average rainfall days in December: 14.5 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in December
Val-de-Mercy, France
- Average snowfall in December: 19mm
The month with the highest snowfall is January (24mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Val-de-Mercy, France
- Average snowfall days in December: 2.4 days
The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Val-de-Mercy, 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: 4h and 0min
The month with the most sunshine is August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Val-de-Mercy, France
- Average sunshine days in December: 13.7 days
The month with the most sunshine days is March (17.8 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in December
Val-de-Mercy, 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
Val-de-Mercy, France
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are August and September (Cloud cover 35).
Average visibility in December
Val-de-Mercy, France
- Average visibility in December: 8km
The months with the highest visibility are February, March, April, July, August, September and October (9km).
The months with the lowest visibility are January, May, June, November and December (8km).
Val-de-Mercy, France
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