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 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
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.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December in Treffiagat?
What are the most humid months in Treffiagat?
What is the average humidity in December in Treffiagat?
How much does it rain in Treffiagat in December?
When does it snow the most in Treffiagat?
When does it start to snow in Treffiagat?
What is the month with the shortest days in Treffiagat?
How many hours of daylight does Treffiagat have in December?
When are sunrise and sunset in December in Treffiagat?
What is the month with the least sunshine in Treffiagat?
How many hours of sunshine does Treffiagat have in December?
What is the month with the lowest UV index in Treffiagat?
What is the UV index intensity in December in Treffiagat?
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).
