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December Weather in Sully, France

Last updated: August 23, 2025

In December, the average temperature in Sully, France hovers around 5°C (40°F). Expect a chill in the air, with minimum temperatures dipping to -4°C (25°F) and maximums reaching up to 15°C (59°F). This month also sees 124 mm (4.9 in) of precipitation spread across 17 days, contributing to an average humidity level of 93%.

December Temperature in Sully

In December in Sully, the average temperature is 5°C (40°F). Maximums can reach 15°C (59°F) and minimums can be as low as -4°C (25°F). Be prepared for a range of temperatures and pack accordingly for your travels.

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

The chart illustrates December temperature patterns in Sully, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sully, December typically has an average temperature of 5°C (40°F), with highs reaching up to 15°C (59°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec374145515766706962534340
Data source: Temperature data for Sully 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 Sully

In Sully in December, the precipitation amount is 124 mm (4.9 in) over the course of 17 days.

December Precipitation Trends in Sully

The chart displays monthly precipitation patterns in Sully, 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 Sully, December typically receives around 124 mm (4.9 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec7360814689786146517974124
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sully

In Sully in December humidity is 93%. With an average temperature of 5°C (40°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities less enjoyable as you grapple with the cold and the heavy, moist air.

December Average Humidity in Sully

This chart illustrates the average monthly humidity levels in Sully, 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 Sully is approximately 93%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%84%82%82%79%72%78%88%91%93%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sully

In Sully 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 Sully.

Maximum UV Index Levels in Sully for December

The chart shows the monthly maximum UV Index (UVI) for Sully 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 Sully typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Sully 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 Sully Compares to Other Months

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

This table compares monthly weather conditions in Sully, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)73 mm (2.9 inches)91%low
February Weather5°C (41°F)60 mm (2.3 inches)89%moderate
March Weather7°C (46°F)81 mm (3.2 inches)86%moderate
April Weather11°C (52°F)46 mm (1.8 inches)84%high
May Weather14°C (58°F)89 mm (3.5 inches)82%very high
June Weather19°C (67°F)78 mm (3.1 inches)82%very high
July Weather21°C (70°F)61 mm (2.4 inches)79%very high
August Weather21°C (69°F)46 mm (1.8 inches)72%very high
September Weather17°C (62°F)51 mm (2.0 inches)78%high
October Weather12°C (54°F)79 mm (3.1 inches)88%moderate
November Weather6°C (44°F)74 mm (2.9 inches)91%low
December Weather5°C (40°F)124 mm (4.9 inches)93%low

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