January Weather in Warsaw, United States

Last updated: June 24, 2025

In January, the average temperature in Warsaw, United States is a brisk 7°C (46°F). Expect chilly nights with minimums dipping to -11°C (12°F), while the mercury can soar to a pleasant 26°C (79°F) during the day. Precipitation reaches 87 mm (3.4 in) over approximately 9 days, and the air carries a notable average humidity of 85%, creating a moist atmosphere perfectly suited for cozying up indoors.

January Temperature in Warsaw

In January in Warsaw, the average temperature is 7°C (46°F), with maximums reaching 26°C (79°F) and minimums dipping as low as -11°C (12°F). Be prepared for a wide range of temperatures when traveling during this time.

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 7°C (46°F), with highs reaching up to 26°C (79°F) and lows dropping to around -11°C (12°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), occurring over a span of 9 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 9 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 85%. With an average temperature of 7°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much colder than it actually is.

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 85%, 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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Warsaw for better planning.

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 4, 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	7°C (46°F)	87 mm (3.4 inches)	85%	moderate
February Weather	10°C (51°F)	86 mm (3.4 inches)	82%	high
March Weather	12°C (55°F)	69 mm (2.7 inches)	81%	very high
April Weather	17°C (63°F)	94 mm (3.7 inches)	80%	very high
May Weather	22°C (72°F)	123 mm (4.8 inches)	81%	extreme
June Weather	25°C (77°F)	159 mm (6.3 inches)	81%	extreme
July Weather	27°C (80°F)	139 mm (5.5 inches)	81%	extreme
August Weather	26°C (79°F)	178 mm (7.0 inches)	80%	very high
September Weather	24°C (75°F)	183 mm (7.2 inches)	79%	very high
October Weather	19°C (67°F)	59 mm (2.3 inches)	80%	very high
November Weather	12°C (54°F)	83 mm (3.3 inches)	85%	moderate
December Weather	9°C (49°F)	111 mm (4.4 inches)	86%	moderate