December weather forecastTreffléan, France
December
Weather in December
The first month of the winter, December, is still a cool month in Treffléan, France, with an average temperature varying between 7.3°C (45.1°F) and 10.5°C (50.9°F).Temperature
As December unfolds, the average high-temperature reaches a still fresh 10.5°C (50.9°F), hinting at a slight fluctuation from the previous month. Treffléan's nocturnal readings in December exhibit minimal variation from the daytime temperatures, averaging at a frosty 7.3°C (45.1°F).Humidity
The months with the highest humidity are January and December, with an average relative humidity of 83%.Rainfall
In Treffléan, in December, during 16.1 rainfall days, 76mm (2.99") of precipitation is typically accumulated. Throughout the year, in Treffléan, there are 169.8 rainfall days, and 593mm (23.35") of precipitation is accumulated.Snowfall
Months with snowfall in Treffléan are February, April and December. The months with the most snowfall in Treffléan are February, April and December, with an average 1mm (0.04") of accumulated snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 08:38 and sunset at 17:20. On the last day of December, in Treffléan, sunrise is at 08:58 and sunset at 17:28 CET.
Sunshine
The average sunshine in December in Treffléan, France, is 4.6h.UV index
The months with the lowest UV index in Treffléan are January through April, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 3 during December translates into the following directions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Treffléan, France
- Average high temperature in December: 10.5°C
The warmest month (with the highest average high temperature) is July (21.3°C).
The month with the lowest average high temperature is January (9.3°C).
- Average low temperature in December: 7.3°C
The month with the highest average low temperature is August (15°C).
The coldest month (with the lowest average low temperature) is February (5.3°C).
Average pressure in December
Treffléan, France
- Average pressure in December: 1018.6mbar
The month with the highest atmospheric pressure is December (1018.6mbar).
The month with the lowest atmospheric pressure is November (1013mbar).
Average wind speed in December
Treffléan, France
- Average wind speed in December: 22.9km/h
The windiest month (with the highest average wind speed) is December (22.9km/h).
The calmest month (with the lowest average wind speed) is August (15.5km/h).
Average humidity in December
Treffléan, France
- Average humidity in December: 83%
The months with the highest relative humidity are January and December (83%).
The months with the lowest relative humidity are August and September (78%).
Average rainfall in December
Treffléan, France
- Average rainfall in December: 76mm
The wettest month (with the highest rainfall) is November (81mm).
The driest month (with the least rainfall) is September (24mm).
Average rainfall days in December
Treffléan, France
- Average rainfall days in December: 16.1 days
The month with the highest number of rainy days is January (17.7 days).
The month with the least rainy days is September (10 days).
Average snowfall in December
Treffléan, France
- Average snowfall in December: 1mm
The months with the highest snowfall are February, April and December (1mm).
The months with the least snowfall are January, March, May, June, July, August, September, October and November (0mm).
Average snowfall days in December
Treffléan, France
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is February (0.5 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
Treffléan, France
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 4h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in December
Treffléan, France
- Average sunshine days in December: 11.4 days
The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is November (10.4 days).
Average UV index in December
Treffléan, 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, March, April, November and December (UV index 3).
Average cloud cover in December
Treffléan, France
- Average cloud cover in December: 52
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 33).
Average visibility in December
Treffléan, 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).
