December weather forecast and climate
Mertenne, Belgium

Weather in December

The first month of the winter, December, is still a cold month in Mertenne, Belgium, with average temperature fluctuating between 1.3°C (34.3°F) and 5.2°C (41.4°F).

Temperature

In Mertenne, the average high-temperature slightly decreases, from a chilly 8.7°C (47.7°F) in November, to a wintry 5.2°C (41.4°F). In Mertenne, the average low-temperature is 1.3°C (34.3°F).

Humidity

The most humid month in Mertenne is December, with an average relative humidity of 91%.

Rainfall

The month with the most rainfall is December when the rain falls for 16 days and typically aggregates up to 71mm (2.8") of precipitation.

Snowfall

January through April, October through December are months with snowfall. In Mertenne, snow falls for 5.8 days, with typically accumulated 65mm (2.56") of snow. In Mertenne, during the entire year, snow falls for 27.2 days, and aggregates up to 247mm (9.72") of snow.

Daylight

December has the shortest days of the year, with an average of 8.1h of daylight.

Sunshine

January and December, with an average of 3.4h of sunshine, are months with the least sunshine in Mertenne, Belgium.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Mertenne?

In December, the average high-temperature is 5.2°C (41.4°F), and the average low-temperature is 1.3°C (34.3°F).

What is the most humid month in Mertenne?

With an average relative humidity of 91%, December is the most humid month in Mertenne, Belgium.

What is the average humidity in December in Mertenne?

In Mertenne, Belgium, the average relative humidity in December is 91%.

How many days does it rain in December in Mertenne?

In December, in Mertenne, the rain falls for 16 days. Throughout December, 71mm (2.8") of precipitation is accumulated.

What is the rainiest month in Mertenne?

December is the month with the most rainfall in Mertenne, Belgium. Rain falls for 16 days and accumulates 71mm (2.8") of precipitation.

How many days does it snow in December in Mertenne?

In Mertenne, Belgium, during December, snow falls for 5.8 days and regularly aggregates up to 65mm (2.56") of snow.

What is the month with the shortest days in Mertenne?

The month with the shortest days in Mertenne, Belgium, is December, with an average of 8.1h of daylight.

What is the average length of the day in December in Mertenne?

The average length of the day in December is 8.1h.

What is the month with the least sunshine in Mertenne?

January and December, with an average of 3.4h of sunshine, are months with the least sunshine in Mertenne, Belgium.

How long on average sun shines in December in Mertenne?

The average sunshine in December in Mertenne, Belgium, is 3.4h.

What is the month with the lowest UV index in Mertenne?

Months with the lowest UV index in Mertenne are January through March, November and December, with an average maximum UV index of 2.

What is the UV index intensity in December in Mertenne?

The average daily maximum UV index in December in Mertenne, Belgium, is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in December
Mertenne, Belgium

Average temperature in December - Mertenne, Belgium
  • Average high temperature in December: 5.2°C

The warmest month (with the highest average high temperature) is July (21.9°C).
The month with the lowest average high temperature is January (3.9°C).

  • Average low temperature in December: 1.3°C

The month with the highest average low temperature is August (12.4°C).
The coldest month (with the lowest average low temperature) is January (-0.2°C).

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Average pressure in December
Mertenne, Belgium

Average pressure in December - Mertenne, Belgium
  • Average pressure in December: 1017.1mbar

The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1013.1mbar).

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Average wind speed in December
Mertenne, Belgium

Average wind speed in December - Mertenne, Belgium
  • Average wind speed in December: 17.4km/h

The windiest month (with the highest average wind speed) is December (17.4km/h).
The calmest month (with the lowest average wind speed) is August (10.6km/h).

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Average humidity in December
Mertenne, Belgium

Average humidity in December - Mertenne, Belgium
  • Average humidity in December: 91%

The month with the highest relative humidity is December (91%).
Months with the lowest relative humidity are April and August (79%).

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Average rainfall in December
Mertenne, Belgium

Average rainfall in December - Mertenne, Belgium
  • Average rainfall in December: 71mm

The wettest month (with the highest rainfall) is December (71mm).
The driest month (with the least rainfall) is April (31mm).

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Average rainfall days in December
Mertenne, Belgium

Average rainfall days in December - Mertenne, Belgium
  • Average rainfall days in December: 16 days

The month with the highest number of rainy days is July (18.9 days).
The month with the least rainy days is February (12.4 days).

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Average snowfall in December
Mertenne, Belgium

Average snowfall in December - Mertenne, Belgium
  • Average snowfall in December: 65mm

The month with the highest snowfall is January (68mm).
Months with the least snowfall are May, June, July, August and September (0mm).

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Average snowfall days in December
Mertenne, Belgium

Average snowfall days in December - Mertenne, Belgium
  • Average snowfall days in December: 5.8 days

The month with the highest number of snowfall days is January (8.2 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Mertenne, Belgium

Average daylight in December / Average sunshine in December - Mertenne, Belgium
  • Average daylight in December: 8.1h

The month with the longest days is June (Average daylight: 16.3h).
The month with the shortest days is December (Average daylight: 8.1h).

  • Average sunshine in December: 3.4h

The month with the most sunshine is July (Average sunshine: 8.9h).
Months with the least sunshine are January and December (Average sunshine: 3.4).

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Average sunshine days in December
Mertenne, Belgium

Average sunshine days in December - Mertenne, Belgium
  • Average sunshine days in December: 9.4 days

Months with the most sunshine days are April and October (13.4 days).
The month with the least sunshine days is December (9.4 days).

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Average UV index in December
Mertenne, Belgium

Average UV index in December - Mertenne, Belgium
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in December
Mertenne, Belgium

Average cloud cover in December - Mertenne, Belgium
  • Average cloud cover in December: 68

The month with the most cloud cover is December (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 43).

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Average visibility in December
Mertenne, Belgium

Average visibility in December - Mertenne, Belgium
  • Average visibility in December: 8km

Months with the highest visibility are March, April and August (9km).
Months with the lowest visibility are January, February, May, June, July, September, October, November and December (8km).

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