December Weather in Sianow, Poland

Last updated: August 27, 2025

In December, the average temperature in Sianow, Poland hovers around 3°C (37°F), with potential lows of -9°C (15°F) and highs reaching 11°C (52°F). During this time, expect 62 mm (2.4 in) of precipitation spread over 14 days, contributing to the 85% average humidity that can make the air feel quite chilly.

December Temperature in Sianow

In December in Sianow, the average temperature is 3°C (37°F), with maximums reaching up to 11°C (52°F) and minimums dipping as low as -9°C (15°F). Travelers should be prepared for cold weather and pack accordingly to fully enjoy their time exploring this beautiful destination.

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

The chart illustrates December temperature patterns in Sianow, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sianow, December typically has an average temperature of 3°C (37°F), with highs reaching up to 11°C (52°F) and lows dropping to around -9°C (15°F).

Data source: Temperature data for Sianow generated using information from the Copernicus Climate Change Service.

December Precipitation in Sianow

In Sianow in December, the precipitation amount is 62 mm (2.4 in) over a span of 14 days.

December Precipitation Trends in Sianow

The chart displays monthly precipitation patterns in Sianow, 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 Sianow, December typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Sianow

In Sianow in December, humidity is 85%. With an average temperature of 3°C (37°F), this humidity feels like a chilling blanket enveloping you, making traveling uncomfortable as your clothes cling to your skin and the cold air bites at your face.

December Average Humidity in Sianow

This chart illustrates the average monthly humidity levels in Sianow, 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 Sianow is approximately 85%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sianow

In Sianow 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 Sianow.

Maximum UV Index Levels in Sianow for December

The chart shows the monthly maximum UV Index (UVI) for Sianow 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 Sianow typically reaches 1, which falls under the low exposure category.

Data source: Sianow 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 Sianow Compares to Other Months

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

This table compares monthly weather conditions in Sianow, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	61 mm (2.4 inches)	87%	low
February Weather	2°C (35°F)	50 mm (2.0 inches)	87%	low
March Weather	4°C (39°F)	54 mm (2.1 inches)	87%	moderate
April Weather	7°C (45°F)	35 mm (1.4 inches)	85%	moderate
May Weather	12°C (54°F)	55 mm (2.2 inches)	81%	high
June Weather	18°C (64°F)	51 mm (2.0 inches)	81%	high
July Weather	18°C (65°F)	110 mm (4.3 inches)	81%	high
August Weather	19°C (66°F)	66 mm (2.6 inches)	80%	high
September Weather	15°C (59°F)	81 mm (3.2 inches)	81%	moderate
October Weather	11°C (52°F)	92 mm (3.6 inches)	84%	moderate
November Weather	7°C (44°F)	58 mm (2.3 inches)	86%	low
December Weather	3°C (37°F)	62 mm (2.4 inches)	85%	low