Brussels
Belgium
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Brussels, Belgium

A beautiful slope garden with several museums in the city of Brussels, Belgium
A beautiful slope garden with several museums in the city of Brussels, Belgium
The first month of the winter, December, is also a frosty month in Brussels, Belgium, with average temperature varying between 1.6°C (34.9°F) and 6.1°C (43°F).

Temperature

In Brussels, the average high-temperature in December marginally drops, from a frosty 9.5°C (49.1°F) in November, to a still chilly 6.1°C (43°F). The average low-temperature, in December, is 1.6°C (34.9°F).

Humidity

With an average relative humidity of 88.8%, December is the most humid month.

Rainfall

December is the month with the most rainfall. Rain falls for 19.3 days and accumulates 81mm (3.2") of precipitation.

Snowfall

Months with snowfall in Brussels are January through April, November and December.

Daylight

December has the shortest days of the year in Brussels, with an average of 8h of daylight.

Sunshine

December has the least sunshine of the year, with an average of 1.5h of sunshine.

UV index

Months with the lowest UV index in Brussels, Belgium, are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV rays for the average person.
The daily maximum UV index of 1 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in Brussels?

In December, in Brussels, Belgium, the average high-temperature is 6.1°C (43°F), and the average low-temperature is 1.6°C (34.9°F).

What is the most humid month in Brussels?

With an average relative humidity of 88.8%, December is the most humid month.

What is the average humidity in December in Brussels?

The average relative humidity in December in Brussels is 88.8%.

How many days does it rain in December in Brussels?

In Brussels, during December, the rain falls for 19.3 days and regularly aggregates up to 81mm (3.2") of precipitation.

What is the rainiest month in Brussels?

December is the month with the most rainfall in Brussels. Rain falls for 19.3 days and accumulates 81mm (3.2") of precipitation.

How many days does it snow in December in Brussels?

In Brussels, Belgium, during December, snow falls for 4.6 days.

What is the month with the shortest days in Brussels?

December has the shortest days of the year in Brussels, with an average of 8h of daylight.

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

In December, the average length of the day is 8h.

What is the month with the least sunshine in Brussels?

With an average of 1.5h of sunshine, December has the least sunshine of the year in Brussels.

How long on average sun shines in December in Brussels?

In Brussels, the average sunshine in December is 1.5h.

What are the months with the lowest UV index in Brussels?

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the UV index reading in December in Brussels?

In Brussels, the average daily maximum UV index in December is 1. A UV Index value of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Brussels, Belgium
  • Average high temperature in December: 6.1°C

The warmest month (with the highest average high temperature) is July (23°C).
The month with the lowest average high temperature is January (5.7°C).

  • Average low temperature in December: 1.6°C

The month with the highest average low temperature is July (14°C).
Coldest months (with the lowest average low temperature) are January and February (0.7°C).

Average humidity in December - Brussels, Belgium
  • Average humidity in December: 88.8%

The month with the highest relative humidity is December (88.8%).
The month with the lowest relative humidity is April (72.5%).

Average rainfall in December - Brussels, Belgium
  • Average rainfall in December: 81mm

The wettest month (with the highest rainfall) is December (81mm).
The driest month (with the lowest rainfall) is April (51.3mm).

Average rainfall days in December - Brussels, Belgium
  • Average rainfall days in December: 19.3 days

The month with the highest number of rainy days is December (19.3 days).
The month with the lowest number of rainy days is July (14.3 days).

Average snowfall days in December - Brussels, Belgium
  • Average snowfall days in December: 4.6 days

The month with the highest number of snowfall days is February (5.9 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Brussels, Belgium
  • Average daylight in December: 8h

The month with the longest days is June (Average daylight: 16.4h).
The month with shortest days is December (Average daylight: 8h).

  • Average sunshine in December: 1.5h

The month with most sunshine is July (Average sunshine: 6.5h).
The month with least sunshine is December (Average sunshine: 1.5h).

Average UV index in December - Brussels, Belgium
  • Average UV index in December: 1

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 1).