December weather forecast
Fontenay-lès-Briis, France

December

Weather in December

The first month of the winter, December, is still a chilly month in Fontenay-lès-Briis, France, with an average temperature ranging between max 7.1°C (44.8°F) and min 2.7°C (36.9°F).

Temperature

In December, the meteorological conditions change slightly, with the average high-temperature moving from a fresh 10.4°C (50.7°F) in November to a chilly 7.1°C (44.8°F). A mild drop to an average of 2.7°C (36.9°F) marks the nights in Fontenay-lès-Briis during December.

Humidity

January and December, with an average relative humidity of 86%, are the most humid months.

Rainfall

In Fontenay-lès-Briis, in December, it is raining for 14.1 days, with typically 31mm (1.22") of accumulated precipitation. Throughout the year, there are 156.2 rainfall days, and 318mm (12.52") of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Fontenay-lès-Briis. The months with the most snowfall are January, March and December, with an average 18mm (0.71") of accumulated snow.

Daylight

With an average of 8h and 24min of daylight, December has the shortest days of the year in Fontenay-lès-Briis, France.
On the first day of December, sunrise is at 08:23 and sunset at 16:58. On the last day of the month, sunrise is at 08:43 and sunset at 17:05 CET.

Sunshine

The average sunshine in December in Fontenay-lès-Briis is 4.2h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: A daily high UV index of 2 in December leads to these guidelines:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.

Frequently asked questions

What are the temperatures in Fontenay-lès-Briis in December?
The average high-temperature, in December, in Fontenay-lès-Briis, is 7.1°C (44.8°F), while the average low-temperature is 2.7°C (36.9°F).
What is the most humid month in Fontenay-lès-Briis?
The months with the highest humidity in Fontenay-lès-Briis are January and December, with an average relative humidity of 86%.
What is the average humidity in December in Fontenay-lès-Briis?
The average relative humidity in December in Fontenay-lès-Briis is 86%.
How many days does it rain in December in Fontenay-lès-Briis?
In Fontenay-lès-Briis, France, in December, it is raining for 14.1 days, with typically 31mm (1.22") of accumulated precipitation.
What is the snowiest month in Fontenay-lès-Briis?
The months with the most snowfall are January, March and December, with an average 18mm (0.71") of accumulated snow.
How many days does it snow in December in Fontenay-lès-Briis?
In December, it is snowing for 2.4 days. Throughout December, 18mm (0.71") of snow is accumulated.
What is the month with the shortest days in Fontenay-lès-Briis?
With an average of 8h and 24min of daylight, December has the shortest days of the year in Fontenay-lès-Briis.
What is the average length of the day in December in Fontenay-lès-Briis?
In December, the average day length in Fontenay-lès-Briis, France, is 8h and 22min.
When are sunrise and sunset in December in Fontenay-lès-Briis?
On the first day of December in Fontenay-lès-Briis, sunrise is at 08:23 and sunset at 16:58. On the last day of the month, sunrise is at 08:43 and sunset at 17:05 CET.
How many hours of sunshine does Fontenay-lès-Briis have in December?
The average sunshine duration in December is 4.2h.
What is the month with the lowest UV index in Fontenay-lès-Briis?
The months with the lowest UV index in Fontenay-lès-Briis, France, are January, February, November and December, with an average maximum UV index of 2.
How high is the UV index in December in Fontenay-lès-Briis?
In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
Average temperature in December
Fontenay-lès-Briis, France
  • Average high temperature in December: 7.1°C

The warmest month (with the highest average high temperature) is August (24.3°C).
The month with the lowest average high temperature is January (5.8°C).

  • Average low temperature in December: 2.7°C

The months with the highest average low temperature are July and August (14.4°C).
The coldest months (with the lowest average low temperature) are January and February (1.6°C).

Average pressure in December
Fontenay-lès-Briis, France
  • Average pressure in December: 1018.3mbar

The month with the highest atmospheric pressure is December (1018.3mbar).
The month with the lowest atmospheric pressure is November (1013.4mbar).

Average wind speed in December
Fontenay-lès-Briis, France
  • Average wind speed in December: 15.6km/h

The windiest month (with the highest average wind speed) is February (16km/h).
The calmest month (with the lowest average wind speed) is August (10.3km/h).

Average humidity in December
Fontenay-lès-Briis, France
  • Average humidity in December: 86%

The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is August (69%).

Average rainfall in December
Fontenay-lès-Briis, France
  • Average rainfall in December: 31mm

The wettest month (with the highest rainfall) is June (40mm).
The driest month (with the least rainfall) is September (15mm).

Average rainfall days in December
Fontenay-lès-Briis, France
  • Average rainfall days in December: 14.1 days

The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is September (9.6 days).

Average snowfall in December
Fontenay-lès-Briis, France
  • Average snowfall in December: 18mm

The months with the highest snowfall are January, March and December (18mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in December
Fontenay-lès-Briis, France
  • Average snowfall days in December: 2.4 days

The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December /
Average sunshine in December
Fontenay-lès-Briis, France
  • Average daylight in December: 8h and 2min

The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in December: 4h and 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in December
Fontenay-lès-Briis, France
  • Average sunshine days in December: 12.7 days

The month with the most sunshine days is September (17.1 days).
The month with the least sunshine days is June (10.9 days).

Average UV index in December
Fontenay-lès-Briis, 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
Fontenay-lès-Briis, France
  • Average cloud cover in December: 58

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 38).

Average visibility in December
Fontenay-lès-Briis, 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).

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