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December Weather in Giornico, Switzerland

Last updated: August 27, 2025

In December, the average temperature in Giornico, Switzerland hovers around -7°C (19°F), with a minimum plunging to -20°C (-4°F) and a maximum reaching 3°C (38°F). Expect considerable moisture as precipitation totals 161 mm (6.3 in) over approximately 16 days, contributing to an average humidity of 90%. Prepare for a chilly and wet month!

December Temperature in Giornico

In December in Giornico, the average temperature is -7°C (19°F). The maximum can reach 3°C (38°F), while the minimum can be as low as -20°C (-4°F). Be prepared for chilly conditions and pack appropriately for your trip.

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

The chart illustrates December temperature patterns in Giornico, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Giornico, December typically has an average temperature of -7°C (19°F), with highs reaching up to 3°C (38°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec162125323950535245372619
Data source: Temperature data for Giornico 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 Giornico

In Giornico in December, the total precipitation amount is 161 mm (6.3 in), occurring over a span of 16 days.

December Precipitation Trends in Giornico

The chart displays monthly precipitation patterns in Giornico, 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 Giornico, December typically receives around 161 mm (6.3 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec10972115130165200205260149221158161
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Giornico

In Giornico in December humidity is 90%. With an average temperature of -7°C (19°F), this humidity feels like a biting chill that penetrates your clothes, making every step outside feel daunting and your breath visible in the frosty air, creating a harsh environment for traveling.

December Average Humidity in Giornico

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

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

Maximum UV Index Levels in Giornico for December

The chart shows the monthly maximum UV Index (UVI) for Giornico 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 Giornico typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24689101097532
Data source: Giornico 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 Giornico Compares to Other Months

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

This table compares monthly weather conditions in Giornico, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)109 mm (4.3 inches)92%low
February Weather-6°C (21°F)72 mm (2.8 inches)89%moderate
March Weather-4°C (25°F)115 mm (4.5 inches)87%high
April Weather0°C (32°F)130 mm (5.1 inches)84%very high
May Weather4°C (39°F)165 mm (6.5 inches)80%very high
June Weather10°C (50°F)200 mm (7.9 inches)82%very high
July Weather12°C (53°F)205 mm (8.1 inches)83%very high
August Weather11°C (52°F)260 mm (10.2 inches)80%very high
September Weather7°C (46°F)149 mm (5.9 inches)83%high
October Weather3°C (37°F)221 mm (8.7 inches)90%moderate
November Weather-3°C (26°F)158 mm (6.2 inches)88%moderate
December Weather-7°C (19°F)161 mm (6.3 inches)90%low

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