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December Weather in Jaun, Switzerland

Last updated: August 27, 2025

In December, the average temperature in Jaun, Switzerland hovers around -3°C (26°F), with minimums dropping as low as -23°C (-10°F) and maximums reaching 8°C (47°F). Prepare for a wet month as rainfall totals 226 mm (8.9 in) over approximately 18 days, and expect high humidity levels averaging 91%.

December Temperature in Jaun

In December in Jaun, the average temperature is -3°C (26°F). The maximum can reach 8°C (47°F), while the minimum can be as low as -23°C (-10°F). Travelers should be prepared for chilly weather and pack appropriate clothing to stay warm.

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

The chart illustrates December temperature patterns in Jaun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jaun, December typically has an average temperature of -3°C (26°F), with highs reaching up to 8°C (47°F) and lows dropping to around -23°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec242934414857595952443426
Data source: Temperature data for Jaun 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 Jaun

In Jaun in December, the total precipitation amount is 226 mm (8.9 in) spread over 18 days.

December Precipitation Trends in Jaun

The chart displays monthly precipitation patterns in Jaun, 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 Jaun, December typically receives around 226 mm (8.9 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec15011814989205181200180117135109226
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Jaun

In Jaun in December humidity is 91%. With an average temperature of -3°C (26°F), this humidity feels like a biting chill that penetrates through your clothing, making travel uncomfortable and the air crisp with an eerie dampness that can quickly sap your energy.

December Average Humidity in Jaun

This chart illustrates the average monthly humidity levels in Jaun, 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 Jaun 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 Jaun

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

Maximum UV Index Levels in Jaun for December

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

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

This table compares monthly weather conditions in Jaun, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (24°F)150 mm (5.9 inches)91%low
February Weather-1°C (30°F)117 mm (4.6 inches)89%moderate
March Weather1°C (34°F)149 mm (5.9 inches)87%high
April Weather5°C (41°F)89 mm (3.5 inches)84%very high
May Weather9°C (48°F)205 mm (8.1 inches)80%very high
June Weather14°C (57°F)181 mm (7.1 inches)82%very high
July Weather15°C (60°F)200 mm (7.9 inches)82%very high
August Weather15°C (59°F)180 mm (7.1 inches)77%very high
September Weather11°C (52°F)117 mm (4.6 inches)81%high
October Weather7°C (44°F)135 mm (5.3 inches)89%moderate
November Weather1°C (34°F)109 mm (4.3 inches)89%moderate
December Weather-3°C (26°F)226 mm (8.9 inches)91%low

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