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December Weather in Saint-Lo, France

Last updated: August 23, 2025

In Saint-Lo, France, the average temperature in December hovers around 7°C (45°F), with minimums dipping to -3°C (26°F) and maximums peaking at 15°C (59°F). Expect a precipitation amount of 126 mm (5.0 in) spread over about 18 days, contributing to a notably high average humidity of 92%.

December Temperature in Saint-Lo

In December in Saint-Lo, the average temperature is 7°C (45°F), with maximums reaching 15°C (59°F) and minimums dropping as low as -3°C (26°F). This climate makes it essential for travelers to pack a range of clothing to stay comfortable throughout the day.

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

The chart illustrates December temperature patterns in Saint-Lo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint-Lo, December typically has an average temperature of 7°C (45°F), with highs reaching up to 15°C (59°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec424447515562656360544745
Data source: Temperature data for Saint-Lo 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-Lo

In Saint-Lo in December, the precipitation amount is 126 mm (5.0 in) spread over 18 days.

December Precipitation Trends in Saint-Lo

The chart displays monthly precipitation patterns in Saint-Lo, 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-Lo, December typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec70778048859459665810384126
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint-Lo

In Saint-Lo in December, humidity is 92%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities feel heavier and less enjoyable for traveling.

December Average Humidity in Saint-Lo

This chart illustrates the average monthly humidity levels in Saint-Lo, 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-Lo is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%86%85%80%80%69%73%79%89%92%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint-Lo

In Saint-Lo 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 Saint-Lo.

Maximum UV Index Levels in Saint-Lo for December

The chart shows the monthly maximum UV Index (UVI) for Saint-Lo 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-Lo typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec234679886421
Data source: Saint-Lo 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-Lo Compares to Other Months

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

This table compares monthly weather conditions in Saint-Lo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)70 mm (2.7 inches)90%low
February Weather7°C (44°F)77 mm (3.0 inches)89%moderate
March Weather8°C (47°F)79 mm (3.1 inches)86%moderate
April Weather10°C (51°F)48 mm (1.9 inches)84%high
May Weather13°C (56°F)85 mm (3.4 inches)80%high
June Weather16°C (62°F)94 mm (3.7 inches)80%very high
July Weather18°C (65°F)59 mm (2.3 inches)69%very high
August Weather17°C (64°F)66 mm (2.6 inches)73%very high
September Weather15°C (60°F)58 mm (2.3 inches)79%high
October Weather12°C (55°F)103 mm (4.0 inches)89%moderate
November Weather8°C (47°F)84 mm (3.3 inches)92%low
December Weather7°C (45°F)126 mm (5.0 inches)92%low

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