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December Weather in Merris, France

Last updated: August 23, 2025

In December, the average temperature in Merris, France hovers around 6°C (43°F). Expect chilly days with minimum temperatures dipping to -3°C (26°F) and a comfortable high reaching 15°C (58°F). The region experiences considerable precipitation, with 94 mm (3.7 in) of rainfall spread over 17 days. Adding to the atmosphere, average humidity lingers at a remarkable 92%, making it a notably damp month.

December Temperature in Merris

In December in Merris, the average temperature is 6°C (43°F). Maximums can reach 15°C (58°F), while minimums can drop as low as -3°C (26°F). This makes it essential to pack layered clothing for your travels.

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

The chart illustrates December temperature patterns in Merris, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merris, December typically has an average temperature of 6°C (43°F), with highs reaching up to 15°C (58°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec414346505663666560554643
Data source: Temperature data for Merris 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 Merris

In Merris in December, the precipitation amount is 94 mm (3.7 in) over the course of 17 days.

December Precipitation Trends in Merris

The chart displays monthly precipitation patterns in Merris, 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 Merris, December typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec635762366260497049805694
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Merris

In Merris 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 Merris

This chart illustrates the average monthly humidity levels in Merris, 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 Merris 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 Merris

In Merris 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 Merris.

Maximum UV Index Levels in Merris for December

The chart shows the monthly maximum UV Index (UVI) for Merris 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 Merris typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Merris 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 Merris Compares to Other Months

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

This table compares monthly weather conditions in Merris, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)63 mm (2.5 inches)91%low
February Weather6°C (43°F)57 mm (2.2 inches)89%low
March Weather8°C (46°F)62 mm (2.4 inches)87%moderate
April Weather10°C (50°F)36 mm (1.4 inches)85%moderate
May Weather13°C (56°F)62 mm (2.4 inches)82%high
June Weather17°C (64°F)60 mm (2.4 inches)82%very high
July Weather19°C (66°F)49 mm (1.9 inches)80%very high
August Weather19°C (66°F)70 mm (2.8 inches)76%high
September Weather16°C (61°F)49 mm (1.9 inches)82%moderate
October Weather13°C (55°F)80 mm (3.2 inches)89%moderate
November Weather8°C (47°F)56 mm (2.2 inches)92%low
December Weather6°C (43°F)94 mm (3.7 inches)92%low

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