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
December
Weather in December
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Fontenay-lès-Briis in December?
What is the most humid month in Fontenay-lès-Briis?
What is the average humidity in December in Fontenay-lès-Briis?
How many days does it rain in December in Fontenay-lès-Briis?
What is the snowiest month in Fontenay-lès-Briis?
How many days does it snow in December in Fontenay-lès-Briis?
What is the month with the shortest days in Fontenay-lès-Briis?
What is the average length of the day in December in Fontenay-lès-Briis?
When are sunrise and sunset in December in Fontenay-lès-Briis?
How many hours of sunshine does Fontenay-lès-Briis have in December?
What is the month with the lowest UV index in Fontenay-lès-Briis?
How high is the UV index in December in Fontenay-lès-Briis?
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).
