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
Boissy-Saint-Léger records a mild change in average high-temperature during December, easing from a cool 10.5°C (50.9°F) in November to a frosty 7.3°C (45.1°F). Boissy-Saint-Léger experiences a steady nighttime temperature of 3°C (37.4°F) throughout the month of December.Humidity
January and December, with an average relative humidity of 85%, are the most humid months in Boissy-Saint-Léger.Rainfall
In Boissy-Saint-Léger, in December, it is raining for 15.4 days, with typically 50mm (1.97") of accumulated precipitation. Throughout the year, in Boissy-Saint-Léger, 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 December, it is snowing for 1.9 days. Throughout December, 17mm (0.67") of snow is accumulated. In Boissy-Saint-Léger, France, during the entire year, snow falls for 8.5 days and aggregates up to 72mm (2.83") of snow.Daylight
The month with the shortest days is December, with an average of 8h and 18min of daylight.On the first day of the month, sunrise is at 08:22 and sunset at 16:56. On the last day of December, in Boissy-Saint-Léger, sunrise is at 08:42 and sunset at 17:03 CET.
Sunshine
The average sunshine in December in Boissy-Saint-Léger is 4.3h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Boissy-Saint-Léger. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 2 in December translates into the following recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Boissy-Saint-Léger?
What are the most humid months in Boissy-Saint-Léger?
What is the average humidity in December in Boissy-Saint-Léger?
How much does it rain in Boissy-Saint-Léger in December?
How much does it snow in Boissy-Saint-Léger in December?
What is the month with the shortest days in Boissy-Saint-Léger?
How many hours of daylight does Boissy-Saint-Léger have in December?
When is the sunrise / sunset in December in Boissy-Saint-Léger?
How many hours of sunshine does Boissy-Saint-Léger have in December?
What are the months with the lowest UV index in Boissy-Saint-Léger?
How high is the UV index in December in Boissy-Saint-Léger?
Average temperature in December
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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 18min).
- Average sunshine in December: 4h and 2min
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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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
Boissy-Saint-Léger, 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).
Boissy-Saint-Léger, France
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