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
December
Weather in December
Temperature
Lannion ushers in December with an average high-temperature of a still cool 10.1°C (50.2°F), showing a close resemblance to the previous month. The low temperature average during December reflects a slight decrease to a chilly 7°C (44.6°F) from the day's peak.Humidity
The average relative humidity in December is 83%.Rainfall
In Lannion, during December, the rain falls for 21.2 days and regularly aggregates up to 74mm (2.91") of precipitation. In Lannion, during the entire year, the rain falls for 214.5 days and collects up to 643mm (25.31") of precipitation.Snowfall
Months with snowfall are January through March, November and December. In December, it is snowing for 0.9 days. Throughout December, 9mm (0.35") of snow is accumulated. In Lannion, during the entire year, snow falls for 4.5 days and aggregates up to 38mm (1.5") 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 the month, sunrise is at 08:45 and sunset at 17:20. On the last day of December, sunrise is at 09:06 and sunset at 17:27 CET.
Sunshine
The average sunshine in December in Lannion is 3.5h.UV index
The average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 3 suggests these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Lannion in December?
What is the average humidity in December?
How much does it rain in December?
How many days does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Lannion have in December?
What is the UV index reading in December?
Average temperature in December
Lannion, France
- Average high temperature in December: 10.1°C
The warmest month (with the highest average high temperature) is August (19.1°C).
The month with the lowest average high temperature is January (9°C).
- Average low temperature in December: 7°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is February (5.4°C).
Average pressure in December
Lannion, France
- Average pressure in December: 1017.2mbar
The month with the highest atmospheric pressure is September (1018.2mbar).
The month with the lowest atmospheric pressure is November (1011.9mbar).
Average wind speed in December
Lannion, France
- Average wind speed in December: 25.3km/h
The windiest months (with the highest average wind speed) are February and December (25.3km/h).
The calmest month (with the lowest average wind speed) is July (16.3km/h).
Average humidity in December
Lannion, France
- Average humidity in December: 83%
The month with the highest relative humidity is June (85%).
The months with the lowest relative humidity are February, March, April, September and October (82%).
Average rainfall in December
Lannion, France
- Average rainfall in December: 74mm
The wettest month (with the highest rainfall) is November (82mm).
The driest month (with the least rainfall) is September (28mm).
Average rainfall days in December
Lannion, France
- Average rainfall days in December: 21.2 days
The month with the highest number of rainy days is November (21.7 days).
The month with the least rainy days is September (13.7 days).
Average snowfall in December
Lannion, France
- Average snowfall in December: 9mm
The month with the highest snowfall is January (11mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in December
Lannion, France
- Average snowfall days in December: 0.9 days
The month with the highest number of snowfall days is February (1.9 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
Lannion, 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 24min).
- Average sunshine in December: 3h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in December
Lannion, France
- Average sunshine days in December: 5.5 days
The month with the most sunshine days is September (11.1 days).
The month with the least sunshine days is November (4.8 days).
Average UV index in December
Lannion, France
- Average UV index in December: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in December
Lannion, France
- Average cloud cover in December: 60
The month with the most cloud cover is January (Cloud cover 62).
The months with the least cloud cover are April, July and September (Cloud cover 42).
Average visibility in December
Lannion, France
- Average visibility in December: 9km
The months with the highest visibility are March, April, June, July and September (10km).
The months with the lowest visibility are January, February, May, August, October, November and December (9km).
