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December Weather in Chateaulin, France

Last updated: August 23, 2025

In December, the average temperature in Chateaulin, France hovers around 8°C (47°F). Expect minimums to dip to 0°C (32°F) and maximums reaching 14°C (57°F). Be prepared for approximately 138 mm (5.4 in) of precipitation spread over 18 days, with humidity levels lingering at a significant 90%.

December Temperature in Chateaulin

In December in Chateaulin, the average temperature is 8°C (47°F). The maximum can reach 14°C (57°F) and the minimum can be as low as 0°C (32°F). Visitors should pack layers and prepare for a mix of cool and mild weather during their stay.

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

The chart illustrates December temperature patterns in Chateaulin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chateaulin, December typically has an average temperature of 8°C (47°F), with highs reaching up to 14°C (57°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec444547515561646360554847
Data source: Temperature data for Chateaulin 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 Chateaulin

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

December Precipitation Trends in Chateaulin

The chart displays monthly precipitation patterns in Chateaulin, 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 Chateaulin, December typically receives around 138 mm (5.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec73977847728349585510993138
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Chateaulin

In Chateaulin in December, humidity is 90%. With an average temperature of 8°C (47°F), this humidity feels like a damp chill enveloping you, making even short walks outside feel uncomfortable and heavy, as if the air is thick with moisture.

December Average Humidity in Chateaulin

This chart illustrates the average monthly humidity levels in Chateaulin, 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 Chateaulin is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%85%84%81%77%63%71%76%89%90%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Chateaulin

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

Maximum UV Index Levels in Chateaulin for December

The chart shows the monthly maximum UV Index (UVI) for Chateaulin 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 Chateaulin typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986522
Data source: Chateaulin 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 Chateaulin Compares to Other Months

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

This table compares monthly weather conditions in Chateaulin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)73 mm (2.9 inches)89%low
February Weather7°C (46°F)96 mm (3.8 inches)88%moderate
March Weather8°C (48°F)78 mm (3.1 inches)85%moderate
April Weather10°C (51°F)47 mm (1.9 inches)84%high
May Weather13°C (56°F)72 mm (2.8 inches)81%very high
June Weather16°C (61°F)83 mm (3.3 inches)77%very high
July Weather18°C (64°F)49 mm (1.9 inches)63%very high
August Weather17°C (63°F)58 mm (2.3 inches)71%very high
September Weather15°C (60°F)55 mm (2.2 inches)76%high
October Weather13°C (55°F)108 mm (4.3 inches)89%moderate
November Weather9°C (49°F)93 mm (3.6 inches)90%low
December Weather8°C (47°F)138 mm (5.4 inches)90%low

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