December weather forecastTreffiagat, France

December

Weather in December

The first month of the winter, December, is still a cool month in Treffiagat, France, with an average temperature varying between 9°C (48.2°F) and 11.4°C (52.5°F).

Temperature

As Treffiagat welcomes December, the average high-temperature is noted at a cool 11.4°C (52.5°F), closely aligning with the preceding month. Treffiagat's nighttime temperature in December shows a minor descent, with a steady average of 9°C (48.2°F).

Humidity

June through August and December, with an average relative humidity of 81%, are the most humid months in Treffiagat, France.

Rainfall

In Treffiagat, in December, it is raining for 14.4 days, with typically 36mm (1.42") of accumulated precipitation. In Treffiagat, during the entire year, the rain falls for 144.1 days and collects up to 289mm (11.38") of precipitation.

Snowfall

Months with snowfall in Treffiagat are January and December. December has the most snowfall days of the year. Snow falls for 0.2 days.

Daylight

December has the shortest days of the year in Treffiagat, with an average of 8h and 30min of daylight.
On the first day of December, sunrise is at 08:45 and sunset at 17:26. On the last day of the month, sunrise is at 09:05 and sunset at 17:34 CET.

Sunshine

With an average of 3.7h of sunshine, December has the least sunshine of the year in Treffiagat, France.

UV index

January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Treffiagat. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: During December, 3 as the daily maximum UV index converts into the following advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

An average high-temperature, in December, in Treffiagat, is 11.4°C (52.5°F) and the average low-temperature is 9°C (48.2°F).

June through August and December, with an average relative humidity of 81%, are most humid months in Treffiagat.

The average relative humidity in December is 81%.

In Treffiagat, in December, it is raining for 14.4 days, with typically 36mm (1.42") of accumulated precipitation.

December has the most snowfall days of the year in Treffiagat, France. Snow falls for 0.2 days.

December is the first month it typically snows in Treffiagat, France. Throughout December, there are 0.2 snowfall days.

With an average of 8h and 30min of daylight, December has the shortest days of the year in Treffiagat, France.

The average day length in December in Treffiagat is 8h and 29min.

In December, on the first day of the month, sunrise is at 08:45 and sunset at 17:26. On the last day of the month, in Treffiagat, France, sunrise is at 09:05 and sunset at 17:34 CET.

December has the least sunshine of the year in Treffiagat, France, with an average of 3.7h of sunshine.

The average sunshine duration in December is 3.7h.

The months with the lowest UV index in Treffiagat, France, are January through April, November and December, with an average maximum UV index of 3.

In Treffiagat, the average daily maximum UV index in December is 3. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

13.3°C

11.4°C

10.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

28.9km/h

29.2km/h

28.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

15.5

14.4

15.6

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.6

12.1

10.8

Average UV index

Average cloud cover

56%

59%

Average visibility

10km

Average temperature in December
Treffiagat, France

Average high temperature in December: 11.4°C

The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is February (9.8°C).

Average low temperature in December: 9°C

The month with the highest average low temperature is August (15.8°C).
The coldest month (with the lowest average low temperature) is February (7.3°C).

Average pressure in December
Treffiagat, France

Average pressure in December: 1018.1mbar

The month with the highest atmospheric pressure is September (1018.5mbar).
The month with the lowest atmospheric pressure is November (1012.6mbar).

Average wind speed in December
Treffiagat, 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 August (18km/h).

Average humidity in December
Treffiagat, France

Average humidity in December: 81%

The months with the highest relative humidity are June, July, August and December (81%).
The months with the lowest relative humidity are February, March, April, September and November (79%).

Average rainfall in December
Treffiagat, France

Average rainfall in December: 36mm

The wettest month (with the highest rainfall) is November (40mm).
The driest month (with the least rainfall) is September (13mm).

Average rainfall days in December
Treffiagat, France

Average rainfall days in December: 14.4 days

The month with the highest number of rainy days is January (15.6 days).
The month with the least rainy days is September (7.8 days).

Average snowfall days in December
Treffiagat, France

Average snowfall days in December: 0.2 days

The month with the highest number of snowfall days is December (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

Average daylight in December /
Average sunshine in December
Treffiagat, 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: 3h and 42min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).

Average sunshine days in December
Treffiagat, France

Average sunshine days in December: 12.1 days

The month with the most sunshine days is September (19.6 days).
The month with the least sunshine days is November (10.6 days).

Average UV index in December
Treffiagat, France

Average UV index in December: 3

The months with the highest UV index are June, July, August and September (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
Treffiagat, France

Average cloud cover in December: 56

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 36).

Average visibility in December
Treffiagat, 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).