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December Weather in Siedlce, Poland

Last updated: August 27, 2025

In Siedlce, Poland, the average temperature in December hovers around 1°C (34°F). Expect minimums dipping to -15°C (5°F) and maximums reaching 13°C (56°F). Be prepared for 70 mm (2.8 in) of precipitation spread over 16 days, coupled with a high average humidity of 91%.

December Temperature in Siedlce

In December in Siedlce, the average temperature is 1°C (34°F), with maximums reaching 13°C (56°F) and minimums dropping as low as -15°C (5°F). Travelers should be prepared for a range of chilly temperatures and pack accordingly for both milder days and possible cold snaps.

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

The chart illustrates December temperature patterns in Siedlce, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siedlce, December typically has an average temperature of 1°C (34°F), with highs reaching up to 13°C (56°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec303439485666666758504234
Data source: Temperature data for Siedlce 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 Siedlce

In Siedlce in December, the precipitation amount is 70 mm (2.8 in) over a period of 16 days.

December Precipitation Trends in Siedlce

The chart displays monthly precipitation patterns in Siedlce, 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 Siedlce, December typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec4361476811595116125102865570
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Siedlce

In Siedlce in December, humidity is 91%. With an average temperature of 1°C (34°F), this humidity feels like an icy embrace, making traveling quite challenging as the air feels heavy and damp, leaving everything damp and cold, and requiring extra layers for comfort.

December Average Humidity in Siedlce

This chart illustrates the average monthly humidity levels in Siedlce, 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 Siedlce is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%88%86%77%69%69%63%59%69%85%90%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Siedlce

In Siedlce 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 Siedlce.

Maximum UV Index Levels in Siedlce for December

The chart shows the monthly maximum UV Index (UVI) for Siedlce 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 Siedlce typically reaches 1, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec225678876421
Data source: Siedlce 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 Siedlce Compares to Other Months

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

This table compares monthly weather conditions in Siedlce, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)43 mm (1.7 inches)91%low
February Weather1°C (34°F)61 mm (2.4 inches)88%low
March Weather4°C (39°F)47 mm (1.8 inches)86%moderate
April Weather9°C (48°F)67 mm (2.7 inches)77%high
May Weather13°C (56°F)114 mm (4.5 inches)69%high
June Weather19°C (66°F)95 mm (3.7 inches)69%very high
July Weather19°C (67°F)116 mm (4.6 inches)63%very high
August Weather19°C (67°F)125 mm (4.9 inches)59%high
September Weather14°C (58°F)102 mm (4.0 inches)69%high
October Weather10°C (50°F)86 mm (3.4 inches)85%moderate
November Weather5°C (42°F)54 mm (2.1 inches)90%low
December Weather1°C (34°F)70 mm (2.8 inches)91%low

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