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December Weather in Kayl, Luxembourg

Last updated: August 23, 2025

In Kayl, Luxembourg, the average temperature in December hovers around 4°C (39°F). Expect chilly nights with minimums dipping to -6°C (22°F) and daytime highs reaching up to 14°C (58°F). With an average precipitation of 128 mm (5.0 in) spread across 19 days, along with a high humidity level of 93%, it's wise to be prepared for a damp atmosphere.

December Temperature in Kayl

In December, in Kayl, the average temperature is 4°C (39°F). The maximum can reach 14°C (58°F), while the minimum can drop as low as -6°C (22°F). Travelers should be prepared for chilly conditions and pack accordingly to make the most of their visit.

December Weather in Kayl: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Kayl, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Kayl, December typically has an average temperature of 4°C (39°F), with highs reaching up to 14°C (58°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec363943495664666659524239
Data source: Temperature data for Kayl generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Kayl

In Kayl in December, the total precipitation amount is 128 mm (5.0 in) spread across 19 days.

December Precipitation Trends in Kayl

The chart displays monthly precipitation patterns in Kayl, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Kayl, December typically receives around 128 mm (5.0 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec7479814074767060668272128
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Kayl

In Kayl in December, humidity is 93%. With an average temperature of 4°C (39°F), this humidity feels like a damp, chilly blanket that clings to your skin, making outdoor exploration uncomfortable and necessitating extra layers to stay warm and dry.

December Average Humidity in Kayl

This chart illustrates the average monthly humidity levels in Kayl, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Kayl is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%90%88%84%81%82%82%80%83%89%91%93%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Kayl

In Kayl in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Kayl.

Maximum UV Index Levels in Kayl for December

The chart shows the monthly maximum UV Index (UVI) for Kayl in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Kayl typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234689886421
Data source: Kayl December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Kayl Compares to Other Months

Weather in Kayl varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Kayl, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Kayl, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)74 mm (2.9 inches)91%low
February Weather4°C (39°F)79 mm (3.1 inches)90%moderate
March Weather6°C (43°F)81 mm (3.2 inches)88%moderate
April Weather10°C (50°F)40 mm (1.6 inches)84%high
May Weather13°C (56°F)74 mm (2.9 inches)81%very high
June Weather18°C (65°F)76 mm (3.0 inches)82%very high
July Weather19°C (67°F)70 mm (2.8 inches)82%very high
August Weather19°C (66°F)60 mm (2.4 inches)80%very high
September Weather15°C (59°F)66 mm (2.6 inches)83%high
October Weather11°C (52°F)82 mm (3.2 inches)89%moderate
November Weather6°C (43°F)72 mm (2.8 inches)91%low
December Weather4°C (39°F)128 mm (5.0 inches)93%low

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