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December Weather in Gilly, Belgium

Last updated: August 22, 2025

In December, the average temperature in Gilly, Belgium hovers around 5°C (41°F), with a minimum dipping to -4°C (25°F) and reaching a maximum of 14°C (58°F). Expect 102 mm (4.0 in) of precipitation spread over 17 days, contributing to an average humidity of 92%. Stay cozy and prepared for the chilly and damp weather!

December Temperature in Gilly

In December in Gilly, the average temperature is 5°C (41°F), with maximums reaching up to 14°C (58°F) and minimums dipping as low as -4°C (25°F). Be prepared for chilly weather and pack layers to stay comfortable during your travels.

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

The chart illustrates December temperature patterns in Gilly, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gilly, December typically has an average temperature of 5°C (41°F), with highs reaching up to 14°C (58°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec384144495664656559534441
Data source: Temperature data for Gilly 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 Gilly

In Gilly in December, the precipitation amount is 102 mm (4.0 in) spread over 17 days.

December Precipitation Trends in Gilly

The chart displays monthly precipitation patterns in Gilly, 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 Gilly, December typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec6972754266747487638560102
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Gilly

In Gilly in December humidity is 92%. With an average temperature of 5°C (41°F), this humidity feels like a cold, damp blanket enveloping you, making travel uncomfortable and dampening the spirits of those unprepared for the chill.

December Average Humidity in Gilly

This chart illustrates the average monthly humidity levels in Gilly, 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 Gilly is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%85%82%82%80%76%82%89%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Gilly

In Gilly 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 Gilly.

Maximum UV Index Levels in Gilly for December

The chart shows the monthly maximum UV Index (UVI) for Gilly 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 Gilly typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234578875421
Data source: Gilly 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 Gilly Compares to Other Months

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

This table compares monthly weather conditions in Gilly, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)69 mm (2.7 inches)91%low
February Weather5°C (41°F)72 mm (2.8 inches)89%moderate
March Weather7°C (45°F)75 mm (3.0 inches)87%moderate
April Weather10°C (50°F)42 mm (1.6 inches)85%moderate
May Weather13°C (56°F)66 mm (2.6 inches)82%high
June Weather18°C (64°F)74 mm (2.9 inches)82%very high
July Weather19°C (66°F)74 mm (2.9 inches)80%very high
August Weather18°C (65°F)87 mm (3.4 inches)76%high
September Weather15°C (59°F)63 mm (2.5 inches)82%moderate
October Weather12°C (53°F)85 mm (3.3 inches)89%moderate
November Weather7°C (45°F)60 mm (2.4 inches)92%low
December Weather5°C (41°F)102 mm (4.0 inches)92%low

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