nomadseason

December Weather in Riddes, Switzerland

Last updated: August 27, 2025

In December, the average temperature in Riddes, Switzerland hovers around -6°C (21°F). However, be prepared for a wide range of conditions, as temperatures can plummet to a chilling -29°C (-21°F) or rise to a maximum of 8°C (46°F). During this month, expect 213 mm (8.4 in) of precipitation over approximately 16 days, contributing to an average humidity of a crisp 91%.

December Temperature in Riddes

In December in Riddes, the average temperature is -6°C (21°F). Maximums can reach 8°C (46°F) and minimums can be as low as -29°C (-21°F). Travelers should prepare for cold conditions and dress warmly to enjoy their visit.

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

The chart illustrates December temperature patterns in Riddes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riddes, December typically has an average temperature of -6°C (21°F), with highs reaching up to 8°C (46°F) and lows dropping to around -29°C (-21°F).
JanFebMarAprMayJunJulAugSepOctNovDec182631394555575750423121
Data source: Temperature data for Riddes generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Riddes

In Riddes in December, the precipitation amount is 213 mm (8.4 in) over the course of 16 days.

December Precipitation Trends in Riddes

The chart displays monthly precipitation patterns in Riddes, 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 Riddes, December typically receives around 213 mm (8.4 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec14010813587191177182173113131101214
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Riddes

In Riddes in December humidity is 91%. With an average temperature of -6°C (21°F), this humidity feels like wandering through a cold, damp fog that clings to your skin, making it challenging to stay warm and comfortable while exploring the surroundings.

December Average Humidity in Riddes

This chart illustrates the average monthly humidity levels in Riddes, 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 Riddes is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%87%84%80%82%82%77%81%89%89%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Riddes

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

Maximum UV Index Levels in Riddes for December

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

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

This table compares monthly weather conditions in Riddes, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)140 mm (5.5 inches)91%low
February Weather-4°C (26°F)108 mm (4.3 inches)89%moderate
March Weather0°C (31°F)135 mm (5.3 inches)87%high
April Weather4°C (39°F)87 mm (3.4 inches)84%very high
May Weather7°C (45°F)191 mm (7.5 inches)80%very high
June Weather13°C (55°F)177 mm (7.0 inches)82%very high
July Weather14°C (58°F)182 mm (7.2 inches)82%very high
August Weather14°C (57°F)173 mm (6.8 inches)77%very high
September Weather10°C (50°F)113 mm (4.5 inches)81%high
October Weather6°C (43°F)131 mm (5.2 inches)89%moderate
November Weather-1°C (31°F)101 mm (4.0 inches)89%moderate
December Weather-6°C (21°F)213 mm (8.4 inches)91%low

Compare Riddes's Climate with Cities Worldwide