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December Weather in Saint-Nazaire, France

Last updated: August 23, 2025

In December, the average temperature in Saint-Nazaire, France hovers around 9°C (49°F), with minimums dipping to 0°C (32°F) and maximums reaching up to 20°C (68°F). Expect 41 mm (1.6 in) of precipitation spread over 5 days, contributing to an average humidity level of 83%.

December Temperature in Saint-Nazaire

In December in Saint-Nazaire, the average temperature is 9°C (49°F). Maximum temperatures can reach 20°C (68°F), while minimums can drop to as low as 0°C (32°F). It's an ideal time for travelers to enjoy a mix of cool and mild weather, perfect for outdoor exploration.

December Weather in Saint-Nazaire: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint-Nazaire, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Nazaire, December typically has an average temperature of 9°C (49°F), with highs reaching up to 20°C (68°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec465053576573787770635349
Data source: Temperature data for Saint-Nazaire 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 Saint-Nazaire

In Saint-Nazaire in December, the precipitation amount is 41 mm (1.6 in) over a period of 5 days.

December Precipitation Trends in Saint-Nazaire

The chart displays monthly precipitation patterns in Saint-Nazaire, 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 Saint-Nazaire, December typically receives around 41 mm (1.6 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec594657785136232849936441
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint-Nazaire

In Saint-Nazaire in December, humidity is 83%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making outdoor activities uncomfortable for traveling and requiring extra layers to stay warm and dry.

December Average Humidity in Saint-Nazaire

This chart illustrates the average monthly humidity levels in Saint-Nazaire, 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 Saint-Nazaire is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%77%73%73%71%67%66%63%70%80%84%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint-Nazaire

In Saint-Nazaire 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 Saint-Nazaire, you can visit Hourly UV Index in Saint-Nazaire.

Maximum UV Index Levels in Saint-Nazaire for December

The chart shows the monthly maximum UV Index (UVI) for Saint-Nazaire 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 Saint-Nazaire typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24579101097532
Data source: Saint-Nazaire 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 Saint-Nazaire Compares to Other Months

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

This table compares monthly weather conditions in Saint-Nazaire, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)59 mm (2.3 inches)82%low
February Weather10°C (50°F)46 mm (1.8 inches)77%moderate
March Weather12°C (53°F)57 mm (2.2 inches)73%moderate
April Weather14°C (58°F)78 mm (3.1 inches)73%high
May Weather18°C (65°F)51 mm (2.0 inches)71%very high
June Weather23°C (73°F)36 mm (1.4 inches)67%very high
July Weather25°C (78°F)23 mm (0.9 inches)66%very high
August Weather25°C (78°F)28 mm (1.1 inches)63%very high
September Weather21°C (71°F)49 mm (1.9 inches)70%high
October Weather17°C (63°F)93 mm (3.7 inches)80%moderate
November Weather12°C (54°F)64 mm (2.5 inches)84%moderate
December Weather9°C (49°F)41 mm (1.6 inches)83%low

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