December weather forecast
Luxembourg City, Luxembourg

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A scenic morning panorama of the rocky city of Luxembourg, in Luxembourg
A scenic morning panorama of the rocky city of Luxembourg, in Luxembourg

Weather in December

December brings the year to a close in Luxembourg City with the advent of winter. The city takes on a festive glow, with Christmas markets and holiday lights adorning the streets. Despite an average high temperature at 3.9°C (39°F), the city springs to life, outlining the lively spirit of the Luxembourgers. The dwindling daylight hours and the chill in the air invite nights in, near cozy fireplaces. The landscape undergoes a magical transformation when it snows, blanketing the city in the pure white of winter.

Temperature

The beginning of December in Luxembourg City brings a slight decrease in the average high-temperature, transitioning from a frosty 7.3°C (45.1°F) in November to a cold 3.9°C (39°F). A mean low-temperature of -0.5°C (31.1°F) is a distinguishing feature of December in Luxembourg City, indicating a slight dip from daytime highs.

Humidity

The months with the highest humidity in Luxembourg City, Luxembourg, are November and December, with an average relative humidity of 88%.

Rainfall

In Luxembourg City, in December, during 16.9 rainfall days, 87mm (3.43") of precipitation is typically accumulated. Throughout the year, there are 182.3 rainfall days, and 897mm (35.31") of precipitation is accumulated.

Daylight

With an average of 8h and 12min of daylight, December has the shortest days of the year in Luxembourg City.
On the first day of December in Luxembourg City, Luxembourg, sunrise is at 08:11 and sunset at 16:38. On the last day of the month, sunrise is at 08:32 and sunset at 16:45 CET.

Sunshine

December has the least sunshine of the year in Luxembourg City, with an average of 1.3h of sunshine.

UV index

The months with the lowest UV index 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 threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In December, a regular UV index of 1 translates into these guidelines:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
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Frequently asked questions

How cold is December in Luxembourg City?

The high-temperature in Luxembourg City during December is 3.9°C (39°F) and the low-temperature is -0.5°C (31.1°F).

What is the most humid month in Luxembourg City?

November and December, with an average relative humidity of 88%, are most humid months.

What is the average humidity in December in Luxembourg City?

In Luxembourg City, the average relative humidity in December is 88%.

How much does it rain in Luxembourg City in December?

In Luxembourg City, Luxembourg, during December, the rain falls for 16.9 days and regularly aggregates up to 87mm (3.43") of precipitation.

What is the month with the shortest days in Luxembourg City?

December has the shortest days of the year in Luxembourg City, Luxembourg, with an average of 8h and 12min of daylight.

How many hours of daylight does Luxembourg City have in December?

The average day length in December is 8h and 13min.

What time are sunrise and sunset in December in Luxembourg City?

In December, on the first day of the month, sunrise is at 08:11 and sunset at 16:38. On the last day of the month, in Luxembourg City, Luxembourg, sunrise is at 08:32 and sunset at 16:45 CET.

What is the month with the least sunshine in Luxembourg City?

December has the least sunshine of the year, with an average of 1.3h of sunshine.

How long on average sun shines in December in Luxembourg City?

The average sunshine duration in December is 1.3h.

What are the months with the lowest UV index in Luxembourg City?

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

How high is the UV index in December in Luxembourg City?

In December, the average daily maximum UV index in Luxembourg City is 1. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Luxembourg City, Luxembourg

Average temperature in December - Luxembourg City, Luxembourg
  • Average high temperature in December: 3.9°C

The warmest month (with the highest average high temperature) is July (23.2°C).
The month with the lowest average high temperature is January (3.1°C).

  • Average low temperature in December: -0.5°C

The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-1.6°C).

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Average humidity in December
Luxembourg City, Luxembourg

Average humidity in December - Luxembourg City, Luxembourg
  • Average humidity in December: 88%

The months with the highest relative humidity are November and December (88%).
The month with the lowest relative humidity is July (67%).

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Average rainfall in December
Luxembourg City, Luxembourg

Average rainfall in December - Luxembourg City, Luxembourg
  • Average rainfall in December: 86.7mm

The wettest month (with the highest rainfall) is October (86.8mm).
The driest month (with the least rainfall) is April (58.2mm).

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Average rainfall days in December
Luxembourg City, Luxembourg

Average rainfall days in December - Luxembourg City, Luxembourg
  • Average rainfall days in December: 16.9 days

The month with the highest number of rainy days is January (18.3 days).
The month with the least rainy days is July (12.5 days).

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Average daylight in December /
Average sunshine in December
Luxembourg City, Luxembourg

Average daylight in December / Average sunshine in December - Luxembourg City, Luxembourg
  • Average daylight in December: 8h and 1min

The month with the longest days is June (Average daylight: 16h and 12min).
The month with the shortest days is December (Average daylight: 8h and 12min).

  • Average sunshine in December: 1h and 2min

The month with the most sunshine is July (Average sunshine: 8h and 6min).
The month with the least sunshine is December (Average sunshine: 1h and 18min).

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Average UV index in December
Luxembourg City, Luxembourg

Average UV index in December - Luxembourg City, Luxembourg
  • Average UV index in December: 1

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

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Luxembourg City, Luxembourg

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