January Weather in Warsaw, United States

Last updated: June 24, 2025

In Warsaw, United States, the average temperature in January hovers around -1°C (31°F). Expect minimums that can plunge to -21°C (-5°F), while the mercury may rise to a comfortable 21°C (70°F). With an average precipitation of 87 mm (3.4 in) spread over 10 days, this month also boasts a notable average humidity of 88%. Prepare for a mix of brisk weather and refreshing rain!

January Temperature in Warsaw

In January in Warsaw, the average temperature is -1°C (31°F). The maximum can reach 21°C (70°F), while the minimum can be as low as -21°C (-5°F). This variation in temperatures makes it essential for travelers to pack appropriately for both warmer days and frigid nights.

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 -1°C (31°F), with highs reaching up to 21°C (70°F) and lows dropping to around -21°C (-5°F).

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

January Precipitation in Warsaw

In Warsaw in January, the precipitation amount is 87 mm (3.4 in) over the course of 10 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 87 mm (3.4 inches) of precipitation spread over approximately 10 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Warsaw

In Warsaw in January, humidity is 88%. With an average temperature of -1°C (31°F), this humidity feels like a biting cold that penetrates your clothing, making outdoor exploration challenging and the air clingy, adding an extra chill that can make you feel even colder than the temperature suggests.

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 88%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	87 mm (3.4 inches)	88%	moderate
February Weather	1°C (35°F)	108 mm (4.2 inches)	88%	moderate
March Weather	6°C (42°F)	108 mm (4.3 inches)	87%	high
April Weather	11°C (52°F)	129 mm (5.1 inches)	87%	very high
May Weather	17°C (63°F)	126 mm (4.9 inches)	81%	very high
June Weather	22°C (71°F)	136 mm (5.4 inches)	83%	very high
July Weather	24°C (76°F)	116 mm (4.6 inches)	82%	very high
August Weather	23°C (73°F)	87 mm (3.4 inches)	76%	very high
September Weather	20°C (69°F)	103 mm (4.0 inches)	77%	very high
October Weather	14°C (58°F)	105 mm (4.1 inches)	82%	high
November Weather	6°C (42°F)	97 mm (3.8 inches)	89%	moderate
December Weather	2°C (37°F)	98 mm (3.9 inches)	86%	low