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December Weather in Trun, Switzerland

Last updated: August 27, 2025

In December, the average temperature in Trun, Switzerland hovers around -6°C (21°F), with extremes ranging from a chilly -25°C (-12°F) to a mild 5°C (42°F). Expect 162 mm (6.4 in) of precipitation over 18 days, contributing to an average humidity of a damp 90%. Prepare for a brisk and moody month ahead!

December Temperature in Trun

In December in Trun, the average temperature is -6°C (21°F), with maximums reaching 5°C (42°F) and minimums dipping as low as -25°C (-12°F). Travelers should be prepared for extremely cold conditions and dress warmly when visiting during this time.

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

The chart illustrates December temperature patterns in Trun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Trun, December typically has an average temperature of -6°C (21°F), with highs reaching up to 5°C (42°F) and lows dropping to around -25°C (-12°F).
JanFebMarAprMayJunJulAugSepOctNovDec182328344152545347392821
Data source: Temperature data for Trun 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 Trun

In Trun in December, the total precipitation amount is 162 mm (6.4 in) over the course of 18 days.

December Precipitation Trends in Trun

The chart displays monthly precipitation patterns in Trun, 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 Trun, December typically receives around 162 mm (6.4 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec12283118100153179199261161166114162
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Trun

In Trun in December humidity is 90%. With an average temperature of -6°C (21°F), this humidity feels like a heavy, icy mist that clings to your skin, making every breath feel sharp and cold, which can be quite challenging for traveling.

December Average Humidity in Trun

This chart illustrates the average monthly humidity levels in Trun, 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 Trun is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Trun

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

Maximum UV Index Levels in Trun for December

The chart shows the monthly maximum UV Index (UVI) for Trun 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 Trun typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24789101097532
Data source: Trun 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 Trun Compares to Other Months

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

This table compares monthly weather conditions in Trun, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)122 mm (4.8 inches)92%low
February Weather-5°C (24°F)83 mm (3.3 inches)89%moderate
March Weather-2°C (28°F)118 mm (4.6 inches)87%high
April Weather1°C (34°F)100 mm (3.9 inches)84%very high
May Weather5°C (42°F)153 mm (6.0 inches)80%very high
June Weather11°C (52°F)179 mm (7.1 inches)82%very high
July Weather12°C (54°F)199 mm (7.8 inches)83%very high
August Weather12°C (54°F)261 mm (10.3 inches)80%very high
September Weather8°C (47°F)161 mm (6.4 inches)83%high
October Weather4°C (40°F)166 mm (6.5 inches)90%moderate
November Weather-2°C (28°F)114 mm (4.5 inches)88%moderate
December Weather-6°C (21°F)162 mm (6.4 inches)90%low

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