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December Weather in Warsaw, United States

Last updated: June 24, 2025

In December, the average temperature in Warsaw, United States hovers around 4°C (40°F). Expect chilly nights with minimums dropping to -15°C (5°F), while daytime highs can reach up to 20°C (69°F). With 108 mm (4.3 in) of precipitation spread over 10 days, the average humidity sits at a brisk 87%, making it a truly refreshing time of year!

December Temperature in Warsaw

In December, in Warsaw, the average temperature is 4°C (40°F). Maximums can reach 20°C (69°F), and minimums can drop as low as -15°C (5°F). Travelers should be prepared for a wide range of temperatures, making layering essential for comfort during their stay.

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

The chart illustrates December temperature patterns in Warsaw, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Warsaw, December typically has an average temperature of 4°C (40°F), with highs reaching up to 20°C (69°F) and lows dropping to around -15°C (5°F).
JanFebMarAprMayJunJulAugSepOctNovDec343846556673777570594439
Data source: Temperature data for Warsaw 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 Warsaw

In Warsaw in December, the total precipitation amount is 108 mm (4.3 in) spread over a duration of 10 days.

December Precipitation Trends in Warsaw

The chart displays monthly precipitation patterns in Warsaw, 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 Warsaw, December typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec831221381321291631169710310392108
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Warsaw

In Warsaw in December humidity is 87%. With an average temperature of 4°C (40°F), this humidity feels like an uncomfortable chill that seeps into your bones, making it essential to dress warmly and prepare for damp conditions, which can dampen your spirits while traveling.

December Average Humidity in Warsaw

This chart illustrates the average monthly humidity levels in Warsaw, 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 Warsaw is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Warsaw

In Warsaw in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Warsaw, you can check the information here.

Maximum UV Index Levels in Warsaw for December

The chart shows the monthly maximum UV Index (UVI) for Warsaw 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 Warsaw typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098643
Data source: Warsaw 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 Warsaw Compares to Other Months

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

This table compares monthly weather conditions in Warsaw, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)83 mm (3.3 inches)87%moderate
February Weather3°C (38°F)122 mm (4.8 inches)85%moderate
March Weather8°C (46°F)138 mm (5.4 inches)86%high
April Weather13°C (55°F)132 mm (5.2 inches)84%very high
May Weather19°C (66°F)129 mm (5.1 inches)79%very high
June Weather23°C (74°F)162 mm (6.4 inches)82%very high
July Weather25°C (77°F)116 mm (4.6 inches)79%very high
August Weather24°C (75°F)97 mm (3.8 inches)70%very high
September Weather21°C (71°F)103 mm (4.0 inches)69%very high
October Weather15°C (59°F)103 mm (4.1 inches)76%high
November Weather7°C (44°F)92 mm (3.6 inches)88%moderate
December Weather4°C (40°F)108 mm (4.3 inches)87%moderate

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