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December Weather in Castau, Romania

Last updated: August 27, 2025

In December, the average temperature in Castau, Romania hovers around 2°C (35°F), with a minimum dipping to -10°C (14°F) and a maximum reaching 14°C (57°F). Expect 96 mm (3.8 in) of precipitation spread over 17 days, with humidity levels high at 90%. Prepare for a cozy and wet experience!

December Temperature in Castau

In December in Castau, the average temperature is 2°C (35°F). Maximum can reach 14°C (57°F), and minimum can be as low as -10°C (14°F). Be prepared for chilly weather and dress in layers to enjoy your travels comfortably.

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

The chart illustrates December temperature patterns in Castau, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castau, December typically has an average temperature of 2°C (35°F), with highs reaching up to 14°C (57°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec293540485664666860504335
Data source: Temperature data for Castau 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 Castau

In Castau in December, the precipitation amount is 96 mm (3.8 in) over a span of 17 days.

December Precipitation Trends in Castau

The chart displays monthly precipitation patterns in Castau, 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 Castau, December typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec566776691331411017457645896
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castau

In Castau in December humidity is 90%. With an average temperature of 2°C (35°F), this humidity feels like a cold, damp blanket that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

December Average Humidity in Castau

This chart illustrates the average monthly humidity levels in Castau, 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 Castau is approximately 90%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%86%83%74%70%67%65%51%58%80%88%90%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castau

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

Maximum UV Index Levels in Castau for December

The chart shows the monthly maximum UV Index (UVI) for Castau 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 Castau typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec246789987532
Data source: Castau 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 Castau Compares to Other Months

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

This table compares monthly weather conditions in Castau, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)56 mm (2.2 inches)91%low
February Weather2°C (36°F)67 mm (2.6 inches)86%moderate
March Weather4°C (40°F)76 mm (3.0 inches)83%high
April Weather9°C (49°F)69 mm (2.7 inches)74%high
May Weather13°C (57°F)133 mm (5.2 inches)70%very high
June Weather18°C (64°F)141 mm (5.5 inches)67%very high
July Weather19°C (67°F)101 mm (4.0 inches)65%very high
August Weather20°C (69°F)74 mm (2.9 inches)51%very high
September Weather15°C (60°F)57 mm (2.2 inches)58%high
October Weather10°C (51°F)64 mm (2.5 inches)80%moderate
November Weather6°C (44°F)58 mm (2.3 inches)88%moderate
December Weather2°C (35°F)96 mm (3.8 inches)90%low

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