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December Weather in Hallau, Switzerland

Last updated: August 27, 2025

In December, the average temperature in Hallau, Switzerland hovers around 2°C (36°F), with temperatures ranging from a chilly -8°C (18°F) to a mild 13°C (56°F). Expect about 120 mm (4.7 in) of rainfall over 18 days, contributing to a notably high average humidity of 90%. 🌧️

December Temperature in Hallau

In December in Hallau, the average temperature is 2°C (36°F). Maximums can reach 13°C (56°F), and minimums can drop as low as -8°C (18°F). Travelers should be prepared for chilly conditions and bring appropriate clothing to stay warm.

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

The chart illustrates December temperature patterns in Hallau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hallau, December typically has an average temperature of 2°C (36°F), with highs reaching up to 13°C (56°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec333742495564666658504036
Data source: Temperature data for Hallau 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 Hallau

In Hallau in December, the precipitation amount reaches 120 mm (4.7 in) over the course of 18 days.

December Precipitation Trends in Hallau

The chart displays monthly precipitation patterns in Hallau, 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 Hallau, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec9274845812312697123748364120
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hallau

In Hallau in December humidity is 90%. With an average temperature of 2°C (36°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and damp, and turning a simple stroll into a test of endurance for travelers.

December Average Humidity in Hallau

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

In Hallau in December, the maximum UV index is 1, which corresponds to a low Exposure Category. This means you have a time to burn of 45 minutes. For more details, you can check the Hourly UV Index in Hallau.

Maximum UV Index Levels in Hallau for December

The chart shows the monthly maximum UV Index (UVI) for Hallau 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 Hallau typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: Hallau 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 Hallau Compares to Other Months

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

This table compares monthly weather conditions in Hallau, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)92 mm (3.6 inches)92%low
February Weather3°C (37°F)74 mm (2.9 inches)89%moderate
March Weather5°C (42°F)84 mm (3.3 inches)87%moderate
April Weather9°C (49°F)58 mm (2.3 inches)84%high
May Weather13°C (55°F)123 mm (4.9 inches)80%very high
June Weather18°C (65°F)126 mm (5.0 inches)82%very high
July Weather19°C (67°F)97 mm (3.8 inches)83%very high
August Weather19°C (66°F)123 mm (4.8 inches)80%very high
September Weather15°C (58°F)74 mm (2.9 inches)83%high
October Weather10°C (50°F)83 mm (3.3 inches)90%moderate
November Weather4°C (40°F)64 mm (2.5 inches)88%low
December Weather2°C (36°F)120 mm (4.7 inches)90%low

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