December weather forecastVannes, France

December

Weather in December

The first month of the winter, December, is also a fresh month in Vannes, France, with an average temperature fluctuating between 10.5°C (50.9°F) and 7.3°C (45.1°F).

Temperature

As November turns into December, the average high-temperatures rest at a still cool 10.5°C (50.9°F), showing a minor variation from the prior month. A modest decline from daytime high temperatures in Vannes is noticed in December, marking the average low at a frosty 7.3°C (45.1°F).

Humidity

January and December, with an average relative humidity of 83%, are the most humid months in Vannes.

Rainfall

In Vannes, in December, it is raining for 16.1 days, with typically 76mm (2.99") of accumulated precipitation. Throughout the year, in Vannes, there are 169.8 rainfall days, and 593mm (23.35") of precipitation is accumulated.

Snowfall

Months with snowfall are February, April and December. The months with the most snowfall in Vannes are February, April and December, with an average 1mm (0.04") of accumulated snow.

Sea temperature

In December, the average sea temperature is 12°C (53.6°F).
Note: You can swim in 12°C (53.6°F) below 10°C (50°F) with proper thermal wear; failing that, the cold shock and respiratory challenges are nearly certain. A short span at 13°C (55.4°F) without it is tough.

Daylight

The month with the shortest days is December, with an average of 8h and 30min of daylight.
On the first day of the month, sunrise is at 08:39 and sunset at 17:21. On the last day of December, in Vannes, France, sunrise is at 08:59 and sunset at 17:29 CET.

Sunshine

In December, the average sunshine in Vannes is 4.6h.

UV index

January through April, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Vannes. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 3 translates into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.

Updated: Feb 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

December temperatures vary between a high-temperature of 10.5°C (50.9°F) and a low-temperature of 7.3°C (45.1°F).

January and December, with an average relative humidity of 83%, are most humid months in Vannes, France.

In Vannes, the average relative humidity in December is 83%.

In Vannes, France, during December, the rain falls for 16.1 days and regularly aggregates up to 76mm (2.99") of precipitation.

The months with the most snowfall are February, April and December, with an average 1mm (0.04") of accumulated snow.

December is the first month it typically snows in Vannes. Throughout December, in the average 0.2 snowfall days, it receives 1mm (0.04") of snow.

In December, the average sea temperature in Vannes is 12°C (53.6°F). At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

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

In December, the average day length in Vannes is 8h and 30min.

On the first day of December in Vannes, France, sunrise is at 08:39 and sunset at 17:21. On the last day of the month, sunrise is at 08:59 and sunset at 17:29 CET.

In December, the average sunshine duration is 4.6h.

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

In Vannes, France, the average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe 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

12.7°C

10.5°C

9.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

23.9km/h

24.4km/h

23.8km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

0.1

0.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

10.4

11.4

11.2

Average UV index

Average cloud cover

Average visibility

Average temperature in December
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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 sea temperature in December
Vannes, France

Average sea temperature in December: 12°C

The best months for swimming (with the highest average sea temperature) are July and August (18°C).
The coldest months (with the lowest average sea temperature) are February and March (10°C).

Average daylight in December /
Average sunshine in December
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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
Vannes, 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).