December Weather in Jollain-Merlin, Belgium

Last updated: August 22, 2025

In December, the average temperature in Jollain-Merlin, Belgium hovers around 6°C (43°F). Expect chilly nights with minimum temperatures dipping to -4°C (26°F), while daytime can reach a pleasant 15°C (59°F). Be prepared for 98 mm (3.9 in) of precipitation over 17 days, contributing to an average humidity of 92%. Embrace the cozy atmosphere!

December Temperature in Jollain-Merlin

In December in Jollain-Merlin, the average temperature is 6°C (43°F). Maximums can reach 15°C (59°F), while minimums can drop as low as -4°C (26°F). Be prepared for a range of weather conditions during your travels!

December Weather in Jollain-Merlin: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Jollain-Merlin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jollain-Merlin, December typically has an average temperature of 6°C (43°F), with highs reaching up to 15°C (59°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec404246505664666660544642
Data source: Temperature data for Jollain-Merlin generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Jollain-Merlin

In Jollain-Merlin in December, the precipitation amount is 98 mm (3.9 in) over a span of 17 days.

December Precipitation Trends in Jollain-Merlin

The chart displays monthly precipitation patterns in Jollain-Merlin, 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 Jollain-Merlin, December typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec646970375857567648816098
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Jollain-Merlin

In Jollain-Merlin in December humidity is 92%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps through your clothes, making outdoor activities uncomfortable and requiring extra layers for warmth while navigating the slick streets.

December Average Humidity in Jollain-Merlin

This chart illustrates the average monthly humidity levels in Jollain-Merlin, 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 Jollain-Merlin 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 Jollain-Merlin

In Jollain-Merlin 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 Jollain-Merlin.

Maximum UV Index Levels in Jollain-Merlin for December

The chart shows the monthly maximum UV Index (UVI) for Jollain-Merlin 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 Jollain-Merlin typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec224578875421
Data source: Jollain-Merlin 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 Jollain-Merlin Compares to Other Months

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

This table compares monthly weather conditions in Jollain-Merlin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)64 mm (2.5 inches)91%low
February Weather6°C (42°F)69 mm (2.7 inches)89%low
March Weather8°C (46°F)70 mm (2.8 inches)87%moderate
April Weather10°C (51°F)37 mm (1.4 inches)85%moderate
May Weather14°C (57°F)58 mm (2.3 inches)82%high
June Weather18°C (65°F)57 mm (2.2 inches)82%very high
July Weather19°C (66°F)56 mm (2.2 inches)80%very high
August Weather19°C (66°F)76 mm (3.0 inches)76%high
September Weather16°C (61°F)48 mm (1.9 inches)82%moderate
October Weather12°C (55°F)81 mm (3.2 inches)89%moderate
November Weather8°C (46°F)60 mm (2.4 inches)92%low
December Weather6°C (43°F)98 mm (3.9 inches)92%low

Compare Jollain-Merlin's Climate with Cities Worldwide