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
The transition into December is marked with an average high-temperature of a chilly 7.2°C (45°F), showing an insignificant shift from November's 10.2°C (50.4°F). Sailly-sur-la-Lys logs an average low-temperature of 3.4°C (38.1°F) during the nights of December, subtly lower than its daytime highs.Humidity
The most humid month in Sailly-sur-la-Lys is December, with an average relative humidity of 87%.Rainfall
The month with the most rainfall in Sailly-sur-la-Lys is December, when the rain falls for 18 days and typically aggregates up to 61mm (2.4") of precipitation.Snowfall
January through March, November and December are months with snowfall. In Sailly-sur-la-Lys, in December, snow falls for 2.5 days, with typically accumulated 26mm (1.02") of snow. In Sailly-sur-la-Lys, during the entire year, snow falls for 11.4 days and aggregates up to 91mm (3.58") 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 Sailly-sur-la-Lys, sunrise is at 08:29 and sunset at 16:47. On the last day of the month, sunrise is at 08:50 and sunset at 16:53 CET.
Sunshine
The months with the least sunshine are January and December, with an average of 4h of sunshine.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 estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the average person.Note: A daily high UV index of 2 in December leads to these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Frequently asked questions
What is the temperature in December in Sailly-sur-la-Lys?
What is the most humid month in Sailly-sur-la-Lys?
What is the average humidity in December in Sailly-sur-la-Lys?
What is the rainiest month in Sailly-sur-la-Lys?
How many days does it rain in December in Sailly-sur-la-Lys?
How many days does it snow in December in Sailly-sur-la-Lys?
What is the month with the shortest days in Sailly-sur-la-Lys?
What is the average length of the day in December in Sailly-sur-la-Lys?
When are sunrise and sunset in December in Sailly-sur-la-Lys?
What are the months with the least sunshine in Sailly-sur-la-Lys?
How long on average sun shines in December in Sailly-sur-la-Lys?
When is the lowest UV index in Sailly-sur-la-Lys?
How high is the UV index in December in Sailly-sur-la-Lys?
Average temperature in December
Sailly-sur-la-Lys, France
- Average high temperature in December: 7.2°C
The warmest months (with the highest average high temperature) are July and August (22.7°C).
The month with the lowest average high temperature is January (6.2°C).
- Average low temperature in December: 3.4°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in December
Sailly-sur-la-Lys, France
- Average pressure in December: 1015.9mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1011.9mbar).
Average wind speed in December
Sailly-sur-la-Lys, France
- Average wind speed in December: 18.2km/h
The windiest month (with the highest average wind speed) is December (18.2km/h).
The calmest month (with the lowest average wind speed) is August (12.9km/h).
Average humidity in December
Sailly-sur-la-Lys, France
- Average humidity in December: 87%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is August (74%).
Average rainfall in December
Sailly-sur-la-Lys, France
- Average rainfall in December: 61mm
The wettest month (with the highest rainfall) is December (61mm).
The driest month (with the least rainfall) is September (12mm).
Average rainfall days in December
Sailly-sur-la-Lys, France
- Average rainfall days in December: 18 days
The month with the highest number of rainy days is December (18 days).
The month with the least rainy days is September (7.5 days).
Average snowfall in December
Sailly-sur-la-Lys, France
- Average snowfall in December: 26mm
The month with the highest snowfall is January (34mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Sailly-sur-la-Lys, France
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (4 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
Sailly-sur-la-Lys, 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 0min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).
Average sunshine days in December
Sailly-sur-la-Lys, France
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is September (21.5 days).
The months with the least sunshine days are February and December (8.5 days).
Average UV index in December
Sailly-sur-la-Lys, 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
Sailly-sur-la-Lys, France
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are April and August (Cloud cover 40).
Average visibility in December
Sailly-sur-la-Lys, 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).
Sailly-sur-la-Lys, France
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