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
December brings a marginal elevation to a frosty 8.5°C (47.3°F) from November's 10.9°C (51.6°F) in Boulogne-sur-Mer's average high-temperatures. In Boulogne-sur-Mer, December is characterized by an average low-temperature of 5.9°C (42.6°F), indicating a minor drop from daytime highs.Humidity
The months with the highest humidity are January, June and December, with an average relative humidity of 83%.Rainfall
December is the month with the most rainfall in Boulogne-sur-Mer. Rain falls for 16.7 days and accumulates 54mm (2.13") of precipitation.Snowfall
Months with snowfall are January through March, November and December. In Boulogne-sur-Mer, in December, during 1 snowfall days, 4mm (0.16") of snow is typically accumulated. In Boulogne-sur-Mer, during the entire year, snow falls for 7.4 days and aggregates up to 40mm (1.57") of snow.Daylight
With an average of 8h and 6min of daylight, December has the shortest days of the year.On the first day of December in Boulogne-sur-Mer, sunrise is at 08:34 and sunset at 16:51. On the last day of the month, sunrise is at 08:55 and sunset at 16:58 CET.
Sunshine
In Boulogne-sur-Mer, France, the average sunshine in December is 4.3h.UV index
In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the temperature in December in Boulogne-sur-Mer?
What are the most humid months in Boulogne-sur-Mer?
What is the average humidity in December in Boulogne-sur-Mer?
What is the wettest month in Boulogne-sur-Mer?
How much does it rain in Boulogne-sur-Mer in December?
How many days does it snow in December in Boulogne-sur-Mer?
What is the month with the shortest days in Boulogne-sur-Mer?
What is the average length of the day in December in Boulogne-sur-Mer?
When are sunrise and sunset in December in Boulogne-sur-Mer?
How many hours of sunshine does Boulogne-sur-Mer have in December?
How high is the UV index in December in Boulogne-sur-Mer?
Average temperature in December
Boulogne-sur-Mer, France
- Average high temperature in December: 8.5°C
The warmest month (with the highest average high temperature) is August (19.6°C).
The month with the lowest average high temperature is January (7°C).
- Average low temperature in December: 5.9°C
The month with the highest average low temperature is August (15.7°C).
The coldest month (with the lowest average low temperature) is January (4.1°C).
Average pressure in December
Boulogne-sur-Mer, France
- Average pressure in December: 1015.8mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1011.6mbar).
Average wind speed in December
Boulogne-sur-Mer, France
- Average wind speed in December: 27.4km/h
The windiest month (with the highest average wind speed) is December (27.4km/h).
The calmest month (with the lowest average wind speed) is July (18.1km/h).
Average humidity in December
Boulogne-sur-Mer, France
- Average humidity in December: 83%
The months with the highest relative humidity are January, June and December (83%).
The months with the lowest relative humidity are August and September (79%).
Average rainfall in December
Boulogne-sur-Mer, France
- Average rainfall in December: 54mm
The wettest month (with the highest rainfall) is December (54mm).
The driest months (with the least rainfall) are April and May (19mm).
Average rainfall days in December
Boulogne-sur-Mer, France
- Average rainfall days in December: 16.7 days
The month with the highest number of rainy days is November (17.9 days).
The month with the least rainy days is April (11.5 days).
Average snowfall in December
Boulogne-sur-Mer, France
- Average snowfall in December: 4mm
The month with the highest snowfall is January (21mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Boulogne-sur-Mer, France
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (2.5 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
Boulogne-sur-Mer, France
- Average daylight in December: 8h and 1min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 4h and 12min).
Average sunshine days in December
Boulogne-sur-Mer, France
- Average sunshine days in December: 9.5 days
The month with the most sunshine days is April (15.4 days).
The month with the least sunshine days is November (9.2 days).
Average UV index in December
Boulogne-sur-Mer, France
- Average UV index in December: 3
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 and November (UV index 2).
Average cloud cover in December
Boulogne-sur-Mer, France
- Average cloud cover in December: 58
The month with the most cloud cover is November (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 38).
Average visibility in December
Boulogne-sur-Mer, France
- Average visibility in December: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Boulogne-sur-Mer, France
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