December Weather in Challans, France

Last updated: August 23, 2025

In Challans, France, the average temperature in December is a cool 9°C (49°F). Expect minimums dipping to 1°C (34°F) and maximums reaching up to 16°C (60°F). During this period, the area sees about 114 mm (4.5 in) of precipitation, typically over 16 days. With an average humidity of 90%, prepare for a damp and chilly experience!

December Temperature in Challans

In December in Challans, the average temperature is 9°C (49°F). The maximum can reach 16°C (60°F), while the minimum can drop to as low as 1°C (34°F). Travelers should prepare for cool weather and pack layers to stay comfortable during their visit.

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

The chart illustrates December temperature patterns in Challans, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Challans, December typically has an average temperature of 9°C (49°F), with highs reaching up to 16°C (60°F) and lows dropping to around 1°C (34°F).

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

December Precipitation in Challans

In Challans in December, the precipitation amount is 114 mm (4.5 in), occurring over a span of 16 days.

December Precipitation Trends in Challans

The chart displays monthly precipitation patterns in Challans, 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 Challans, December typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 16 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 Challans

In Challans in December humidity is 90%. With an average temperature of 9°C (49°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less enjoyable and necessitating extra layers to stay warm and comfortable while traveling.

December Average Humidity in Challans

This chart illustrates the average monthly humidity levels in Challans, 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 Challans is approximately 90%, 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 Challans

In Challans 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 Challans, you can visit Hourly UV Index in Challans.

Maximum UV Index Levels in Challans for December

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

Data source: Challans 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 Challans Compares to Other Months

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

This table compares monthly weather conditions in Challans, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (46°F)	54 mm (2.1 inches)	88%	low
February Weather	9°C (48°F)	64 mm (2.5 inches)	87%	moderate
March Weather	10°C (50°F)	64 mm (2.5 inches)	84%	moderate
April Weather	12°C (54°F)	36 mm (1.4 inches)	83%	high
May Weather	15°C (59°F)	55 mm (2.2 inches)	81%	very high
June Weather	18°C (65°F)	68 mm (2.7 inches)	75%	very high
July Weather	20°C (68°F)	36 mm (1.4 inches)	65%	very high
August Weather	19°C (67°F)	43 mm (1.7 inches)	67%	very high
September Weather	18°C (64°F)	45 mm (1.8 inches)	75%	high
October Weather	15°C (58°F)	77 mm (3.0 inches)	85%	moderate
November Weather	11°C (51°F)	83 mm (3.3 inches)	88%	low
December Weather	9°C (49°F)	114 mm (4.5 inches)	90%	low