January Weather in Warsaw, United States

Last updated: June 24, 2025

In January, the average temperature in Warsaw, United States hovers around 4°C (40°F). Temperatures can vary significantly, with a minimum of -15°C (6°F) and a maximum reaching 21°C (71°F). Expect to see about 65 mm (2.6 in) of precipitation spread over 8 days, contributing to an average humidity of 84%.

January Temperature in Warsaw

In January in Warsaw, the average temperature is 4°C (40°F). Maximums can reach 21°C (71°F), while minimums can drop as low as -15°C (6°F). Travelers should be prepared for a wide range of temperatures and ensure they have suitable clothing for both warm and cold conditions.

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 (40°F), with highs reaching up to 21°C (71°F) and lows dropping to around -15°C (6°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 total precipitation amount is 65 mm (2.6 in) spread over the course of 8 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 65 mm (2.6 inches) of precipitation spread over approximately 8 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 84%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring extra layers to stay warm and dry while traveling.

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 84%, 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	4°C (40°F)	65 mm (2.6 inches)	84%	moderate
February Weather	6°C (44°F)	95 mm (3.8 inches)	83%	high
March Weather	9°C (49°F)	83 mm (3.3 inches)	82%	high
April Weather	15°C (59°F)	97 mm (3.8 inches)	81%	very high
May Weather	20°C (68°F)	111 mm (4.4 inches)	80%	very high
June Weather	24°C (76°F)	116 mm (4.6 inches)	82%	very high
July Weather	27°C (81°F)	129 mm (5.1 inches)	81%	very high
August Weather	26°C (79°F)	168 mm (6.6 inches)	81%	very high
September Weather	23°C (74°F)	108 mm (4.3 inches)	78%	very high
October Weather	18°C (64°F)	123 mm (4.8 inches)	80%	high
November Weather	10°C (50°F)	79 mm (3.1 inches)	84%	moderate
December Weather	7°C (44°F)	92 mm (3.6 inches)	84%	moderate