December Weather in Merlines, France

Last updated: August 23, 2025

In Merlines, France, the average temperature in December hovers around 4°C (39°F). Expect chilly days, with temperatures dipping as low as -7°C (20°F) and peaking at 15°C (59°F). Be prepared for notable precipitation, with around 138 mm (5.4 in) falling over 18 days. The air carries a heavy average humidity of 92%, making it feel even cooler.

December Temperature in Merlines

In December in Merlines, the average temperature is 4°C (39°F). Maximum temperatures can reach 15°C (59°F), while the minimum can drop as low as -7°C (20°F). Be prepared for chilly weather and pack accordingly if you plan to travel during this time.

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

The chart illustrates December temperature patterns in Merlines, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Merlines, December typically has an average temperature of 4°C (39°F), with highs reaching up to 15°C (59°F) and lows dropping to around -7°C (20°F).

Data source: Temperature data for Merlines generated using information from the Copernicus Climate Change Service.

December Precipitation in Merlines

In Merlines in December, the precipitation amount is 138 mm (5.4 in), occurring over the course of 18 days.

December Precipitation Trends in Merlines

The chart displays monthly precipitation patterns in Merlines, 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 Merlines, December typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 18 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Merlines

In Merlines in December humidity is 92%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel feel burdensome as you navigate through the thick, muggy air.

December Average Humidity in Merlines

This chart illustrates the average monthly humidity levels in Merlines, 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 Merlines is approximately 92%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Merlines

In Merlines in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Merlines, you can visit Hourly UV Index in Merlines.

Maximum UV Index Levels in Merlines for December

The chart shows the monthly maximum UV Index (UVI) for Merlines 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 Merlines typically reaches 2, which falls under the low exposure category.

Data source: Merlines 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 Merlines Compares to Other Months

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

This table compares monthly weather conditions in Merlines, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (36°F)	88 mm (3.5 inches)	90%	low
February Weather	4°C (40°F)	76 mm (3.0 inches)	87%	moderate
March Weather	6°C (43°F)	92 mm (3.6 inches)	85%	high
April Weather	9°C (48°F)	67 mm (2.6 inches)	84%	high
May Weather	12°C (54°F)	121 mm (4.8 inches)	84%	very high
June Weather	16°C (61°F)	109 mm (4.3 inches)	82%	very high
July Weather	18°C (65°F)	74 mm (2.9 inches)	79%	very high
August Weather	18°C (65°F)	57 mm (2.2 inches)	75%	very high
September Weather	15°C (58°F)	70 mm (2.7 inches)	79%	high
October Weather	10°C (51°F)	76 mm (3.0 inches)	86%	moderate
November Weather	6°C (42°F)	91 mm (3.6 inches)	90%	moderate
December Weather	4°C (39°F)	138 mm (5.4 inches)	92%	low