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December Weather in Sieradz, Poland

Last updated: August 27, 2025

In December, the average temperature in Sieradz, Poland hovers around 2°C (36°F), with a notable range that can dip to a brisk -16°C (3°F) and reach a maximum of 15°C (59°F). Expect about 48 mm (1.9 in) of precipitation over 14 days, contributing to a humid atmosphere with an average humidity level of 92%.

December Temperature in Sieradz

In December in Sieradz, the average temperature is 2°C (36°F). The maximum can reach 15°C (59°F), while the minimum can be as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures, from chilly days to the potential for frost, so layering is essential.

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

The chart illustrates December temperature patterns in Sieradz, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sieradz, December typically has an average temperature of 2°C (36°F), with highs reaching up to 15°C (59°F) and lows dropping to around -16°C (3°F).
JanFebMarAprMayJunJulAugSepOctNovDec323439485768686959514335
Data source: Temperature data for Sieradz 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 Sieradz

In Sieradz in December, the precipitation amount is 48 mm (1.9 in) spread over 14 days.

December Precipitation Trends in Sieradz

The chart displays monthly precipitation patterns in Sieradz, 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 Sieradz, December typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec424540477776728282663648
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sieradz

In Sieradz in December humidity is 92%. With an average temperature of 2°C (36°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable and requiring extra layers to stay warm and dry.

December Average Humidity in Sieradz

This chart illustrates the average monthly humidity levels in Sieradz, 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 Sieradz is approximately 92%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%79%65%66%67%67%72%83%90%92%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sieradz

In Sieradz 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 Sieradz.

Maximum UV Index Levels in Sieradz for December

The chart shows the monthly maximum UV Index (UVI) for Sieradz 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 Sieradz typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124577876321
Data source: Sieradz 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 Sieradz Compares to Other Months

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

This table compares monthly weather conditions in Sieradz, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)42 mm (1.7 inches)90%low
February Weather1°C (34°F)45 mm (1.8 inches)88%low
March Weather4°C (40°F)40 mm (1.6 inches)86%moderate
April Weather9°C (49°F)47 mm (1.8 inches)79%moderate
May Weather14°C (57°F)77 mm (3.0 inches)65%high
June Weather20°C (68°F)76 mm (3.0 inches)66%high
July Weather20°C (68°F)72 mm (2.9 inches)67%very high
August Weather20°C (69°F)82 mm (3.2 inches)67%high
September Weather15°C (60°F)82 mm (3.2 inches)72%high
October Weather11°C (51°F)66 mm (2.6 inches)83%moderate
November Weather6°C (43°F)36 mm (1.4 inches)90%low
December Weather2°C (36°F)48 mm (1.9 inches)92%low

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