December weather forecast
Treffiagat, 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.

Frequently asked questions

What is the temperature in December in Treffiagat?
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).
What are the most humid months in Treffiagat?
June through August and December, with an average relative humidity of 81%, are most humid months in Treffiagat.
What is the average humidity in December in Treffiagat?
The average relative humidity in December is 81%.
How much does it rain in Treffiagat in December?
In Treffiagat, in December, it is raining for 14.4 days, with typically 36mm (1.42") of accumulated precipitation.
When does it snow the most in Treffiagat?
December has the most snowfall days of the year in Treffiagat, France. Snow falls for 0.2 days.
When does it start to snow in Treffiagat?
December is the first month it typically snows in Treffiagat, France. Throughout December, there are 0.2 snowfall days.
What is the month with the shortest days in Treffiagat?
With an average of 8h and 30min of daylight, December has the shortest days of the year in Treffiagat, France.
How many hours of daylight does Treffiagat have in December?
The average day length in December in Treffiagat is 8h and 29min.
When are sunrise and sunset in December in Treffiagat?
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.
What is the month with the least sunshine in Treffiagat?
December has the least sunshine of the year in Treffiagat, France, with an average of 3.7h of sunshine.
How many hours of sunshine does Treffiagat have in December?
The average sunshine duration in December is 3.7h.
What is the month with the lowest UV index in Treffiagat?
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.
What is the UV index intensity in December in Treffiagat?
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.
Average high temperature
Average low temperature
Average wind speed
Average max. wind speed
Average wind speed gusts
Average humidity
Average rainfall
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility
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 3min

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 4min

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).

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