December weather forecastChilly-Mazarin, France
December
Weather in December
December, the first month of the winter in Chilly-Mazarin, is also a frosty month, with an average temperature varying between 3°C (37.4°F) and 7.3°C (45.1°F).Temperature
As November makes way for December, Chilly-Mazarin's average high-temperature eases from a fresh 10.5°C (50.9°F) to a chilly 7.3°C (45.1°F). A consistent average low of 3°C (37.4°F) is noted throughout December, only a small step down from its daytime high.Humidity
The months with the highest humidity in Chilly-Mazarin are January and December, with an average relative humidity of 85%.Rainfall
In Chilly-Mazarin, during December, the rain falls for 15.4 days and regularly aggregates up to 50mm (1.97") of precipitation. Throughout the year, in Chilly-Mazarin, there are 172.7 rainfall days, and 467mm (18.39") of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Chilly-Mazarin, during December, snow falls for 1.9 days and regularly aggregates up to 17mm (0.67") of snow. In Chilly-Mazarin, during the entire year, snow falls for 8.5 days and aggregates up to 72mm (2.83") of snow.Daylight
With an average of 8h and 24min of daylight, December has the shortest days of the year.On the first day of December in Chilly-Mazarin, sunrise is at 08:22 and sunset at 16:57. On the last day of the month, sunrise is at 08:43 and sunset at 17:04 CET.
Sunshine
In December, the average sunshine is 4.3h.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 reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 2 during December leads to these instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Chilly-Mazarin, France
- Average high temperature in December: 7.3°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 (6°C).
- Average low temperature in December: 3°C
The month with the highest average low temperature is August (15.1°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in December
Chilly-Mazarin, France
- Average pressure in December: 1018.4mbar
The month with the highest atmospheric pressure is December (1018.4mbar).
The month with the lowest atmospheric pressure is November (1013.5mbar).
Average wind speed in December
Chilly-Mazarin, 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 (10km/h).
Average humidity in December
Chilly-Mazarin, France
- Average humidity in December: 85%
The months with the highest relative humidity are January and December (85%).
The month with the lowest relative humidity is August (68%).
Average rainfall in December
Chilly-Mazarin, France
- Average rainfall in December: 50mm
The wettest month (with the highest rainfall) is June (52mm).
The driest month (with the least rainfall) is September (21mm).
Average rainfall days in December
Chilly-Mazarin, France
- Average rainfall days in December: 15.4 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is September (10.7 days).
Average snowfall in December
Chilly-Mazarin, France
- Average snowfall in December: 17mm
The month with the highest snowfall is January (29mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Chilly-Mazarin, France
- Average snowfall days in December: 1.9 days
The month with the highest number of snowfall days is February (2.8 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
Chilly-Mazarin, France
- Average daylight in December: 8h and 24min
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 18min
The month with the most sunshine is August (Average sunshine: 9h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in December
Chilly-Mazarin, France
- Average sunshine days in December: 12 days
The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in December
Chilly-Mazarin, France
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Chilly-Mazarin, France
- Average cloud cover in December: 57
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 37).
Average visibility in December
Chilly-Mazarin, 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).
