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January Weather in Warsaw, United States

Last updated: June 24, 2025

In Warsaw, United States, the average temperature for January hovers around -4°C (25°F). Expect a chillier minimum of -23°C (-9°F), while the mercury can rise to a pleasant maximum of 17°C (62°F). Be prepared for 83 mm (3.3 in) of precipitation over 14 days, with high humidity levels averaging at a drizzly 91%.

January Temperature in Warsaw

In January in Warsaw, the average temperature is -4°C (25°F). The maximum can reach 17°C (62°F), and the minimum can be as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures and dress in layers to ensure comfort during their visit.

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

The chart illustrates January 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, January typically has an average temperature of -4°C (25°F), with highs reaching up to 17°C (62°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec252734445766706963523830
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.

January Precipitation in Warsaw

In Warsaw in January, the precipitation amount is 83 mm (3.3 in) spread over a period of 14 days.

January Precipitation Trends in Warsaw

The chart displays monthly precipitation patterns in Warsaw, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Warsaw, January typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec838981120118101144104751409497
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Warsaw

In Warsaw in January humidity is 91%. With an average temperature of -4°C (25°F), this humidity feels like a biting chill that penetrates your clothing, making it uncomfortable for traveling as every gust of wind amplifies the cold and dampness in the air.

January Average Humidity in Warsaw

This chart illustrates the average monthly humidity levels in Warsaw, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Warsaw is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%91%88%88%82%80%77%72%76%83%88%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Warsaw

In Warsaw in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Warsaw in January, 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 January, the maximum UV index in Warsaw typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346810101098642
Data source: Warsaw January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)83 mm (3.3 inches)91%moderate
February Weather-3°C (28°F)89 mm (3.5 inches)91%moderate
March Weather1°C (34°F)81 mm (3.2 inches)88%high
April Weather7°C (45°F)120 mm (4.7 inches)88%very high
May Weather14°C (57°F)118 mm (4.6 inches)82%very high
June Weather19°C (66°F)101 mm (4.0 inches)79%very high
July Weather21°C (71°F)144 mm (5.7 inches)77%very high
August Weather20°C (69°F)104 mm (4.1 inches)72%very high
September Weather17°C (63°F)75 mm (3.0 inches)76%very high
October Weather11°C (52°F)140 mm (5.5 inches)83%high
November Weather3°C (38°F)94 mm (3.7 inches)88%moderate
December Weather-1°C (31°F)97 mm (3.8 inches)87%low

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