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 sea temperature 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
December's commencement is accompanied by an average high-temperature of a frosty 8.7°C (47.7°F), diverging marginally from November's 11.2°C (52.2°F). December introduces a small decrease to a nighttime average of 6.4°C (43.5°F) in Calais.Humidity
In December, the average relative humidity is 82%.Rainfall
In December, the rain falls for 16.5 days. Throughout December, 52mm (2.05") of precipitation is accumulated. Throughout the year, there are 178.1 rainfall days, and 461mm (18.15") of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall in Calais, France. In Calais, in December, during 1 snowfall days, 6mm (0.24") of snow is typically accumulated. In Calais, during the entire year, snow falls for 6.2 days and aggregates up to 46mm (1.81") of snow.Sea temperature
In Calais, in December, the average water temperature is 11.3°C (52.3°F).Note: It is advised against swimming in 11.3°C (52.3°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
December has the shortest days of the year in Calais, with an average of 8h and 0min of daylight.On the first day of December in Calais, sunrise is at 08:34 and sunset at 16:49. On the last day of the month, sunrise is at 08:55 and sunset at 16:56 CET.
Sunshine
In Calais, France, the average sunshine in December is 4.2h.UV index
In Calais, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 3 in December interprets into the following recommendations:
Act with care - The need to guard against sun damage is communicated. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature in Calais?
What is the average humidity in December in Calais?
How much does it rain in Calais in December?
How many days does it snow in December in Calais?
How cold is the water in December in Calais?
What is the month with the shortest days in Calais?
How many hours of daylight does Calais have in December?
When are sunrise and sunset in December in Calais?
How long on average sun shines in December in Calais?
What is the UV index intensity in December in Calais?
Average temperature in December
Calais, France
- Average high temperature in December: 8.7°C
The warmest month (with the highest average high temperature) is August (19.7°C).
The month with the lowest average high temperature is February (7.1°C).
- Average low temperature in December: 6.4°C
The month with the highest average low temperature is August (15.9°C).
The coldest months (with the lowest average low temperature) are January and February (4.5°C).
Average pressure in December
Calais, France
- Average pressure in December: 1015.6mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1011.5mbar).
Average wind speed in December
Calais, France
- Average wind speed in December: 28.2km/h
The windiest month (with the highest average wind speed) is December (28.2km/h).
The calmest month (with the lowest average wind speed) is July (19km/h).
Average humidity in December
Calais, France
- Average humidity in December: 82%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is September (78%).
Average rainfall in December
Calais, France
- Average rainfall in December: 52mm
The wettest month (with the highest rainfall) is October (55mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in December
Calais, France
- Average rainfall days in December: 16.5 days
The month with the highest number of rainy days is November (19.5 days).
The month with the least rainy days is April (12.2 days).
Average snowfall in December
Calais, France
- Average snowfall in December: 6mm
The month with the highest snowfall is January (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Calais, France
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is January (2.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in December
Calais, France
- Average sea temperature in December: 11.3°C
The best months for swimming (with the highest average sea temperature) are August and September (17.8°C).
The coldest month (with the lowest average sea temperature) is March (7.7°C).
Average daylight in December /
Average sunshine in December
Calais, France
- Average daylight in December: 8h and 0min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in December: 4h and 1min
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 6min).
Average sunshine days in December
Calais, France
- Average sunshine days in December: 10 days
The month with the most sunshine days is April (15.7 days).
The month with the least sunshine days is November (8.8 days).
Average UV index in December
Calais, 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 and February (UV index 2).
Average cloud cover in December
Calais, France
- Average cloud cover in December: 59
The months with the most cloud cover are November and December (Cloud cover 59).
The months with the least cloud cover are April and August (Cloud cover 39).
Average visibility in December
Calais, France
- Average visibility in December: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
