January Weather in Warsaw, United States

Last updated: June 24, 2025

In January, the average temperature in Warsaw, United States hovers around -2°C (28°F). However, be prepared for a wide temperature range, with lows plummeting to -28°C (-17°F) and highs reaching up to 16°C (61°F). On average, you can expect around 57 mm (2.3 in) of precipitation over 7 days, coupled with a notable average humidity of 81%.

January Temperature in Warsaw

In January in Warsaw, the average temperature is -2°C (28°F). The maximum can reach 16°C (61°F) and the minimum can be as low as -28°C (-17°F). Travelers should be prepared for a wide temperature range and dress in layers to stay comfortable.

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 -2°C (28°F), with highs reaching up to 16°C (61°F) and lows dropping to around -28°C (-17°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 57 mm (2.3 in) over a span of 7 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 57 mm (2.3 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Warsaw

In Warsaw in January, humidity is 81%. With an average temperature of -2°C (28°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and necessitating extra layers to stay warm and dry.

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 81%, 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	-2°C (28°F)	57 mm (2.3 inches)	81%	moderate
February Weather	-1°C (30°F)	57 mm (2.3 inches)	81%	moderate
March Weather	6°C (43°F)	107 mm (4.2 inches)	81%	high
April Weather	11°C (52°F)	99 mm (3.9 inches)	82%	very high
May Weather	18°C (65°F)	172 mm (6.8 inches)	78%	very high
June Weather	24°C (76°F)	108 mm (4.2 inches)	81%	extreme
July Weather	26°C (79°F)	88 mm (3.5 inches)	79%	very high
August Weather	24°C (76°F)	91 mm (3.6 inches)	77%	very high
September Weather	21°C (71°F)	93 mm (3.7 inches)	78%	very high
October Weather	13°C (56°F)	110 mm (4.3 inches)	78%	high
November Weather	5°C (42°F)	50 mm (2.0 inches)	87%	moderate
December Weather	2°C (35°F)	41 mm (1.6 inches)	84%	low