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December Weather in Sankt Gallen, Austria

Last updated: August 22, 2025

In Sankt Gallen, Austria, the average temperature in December hovers around -1°C (31°F). Temperatures can dip as low as -20°C (-4°F) or climb to a maximum of 12°C (54°F). Expect 121 mm (4.8 in) of precipitation over 18 days, contributing to an average humidity of 89%. Stay prepared for the chilly and damp conditions!

December Temperature in Sankt Gallen

In December in Sankt Gallen, the average temperature is -1°C (31°F). Maximums can reach 12°C (54°F), while minimums can drop as low as -20°C (-4°F). Travelers should be prepared for a wide range of temperatures, from chilly days to significantly colder nights.

December Weather in Sankt Gallen: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sankt Gallen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sankt Gallen, December typically has an average temperature of -1°C (31°F), with highs reaching up to 12°C (54°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec273236445262636355473830
Data source: Temperature data for Sankt Gallen 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 Sankt Gallen

In Sankt Gallen in December, the precipitation amount is 121 mm (4.8 in) distributed over 18 days.

December Precipitation Trends in Sankt Gallen

The chart displays monthly precipitation patterns in Sankt Gallen, 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 Sankt Gallen, December typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec10180898218014719418715010776121
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sankt Gallen

In Sankt Gallen in December humidity is 89%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and urging you to seek warmth indoors.

December Average Humidity in Sankt Gallen

This chart illustrates the average monthly humidity levels in Sankt Gallen, 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 Sankt Gallen is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%87%82%79%74%75%74%69%74%88%90%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sankt Gallen

In Sankt Gallen 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 Sankt Gallen, you can visit Hourly UV Index in Sankt Gallen.

Maximum UV Index Levels in Sankt Gallen for December

The chart shows the monthly maximum UV Index (UVI) for Sankt Gallen 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 Sankt Gallen typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec236789987432
Data source: Sankt Gallen 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 Sankt Gallen Compares to Other Months

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

This table compares monthly weather conditions in Sankt Gallen, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)101 mm (4.0 inches)91%low
February Weather0°C (32°F)80 mm (3.1 inches)87%moderate
March Weather2°C (36°F)89 mm (3.5 inches)82%high
April Weather7°C (44°F)82 mm (3.2 inches)79%high
May Weather11°C (52°F)180 mm (7.1 inches)74%very high
June Weather17°C (62°F)147 mm (5.8 inches)75%very high
July Weather17°C (63°F)194 mm (7.6 inches)74%very high
August Weather17°C (63°F)187 mm (7.4 inches)68%very high
September Weather13°C (55°F)150 mm (5.9 inches)74%high
October Weather8°C (47°F)107 mm (4.2 inches)88%moderate
November Weather3°C (38°F)76 mm (3.0 inches)90%moderate
December Weather-1°C (31°F)121 mm (4.8 inches)89%low

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