January Weather in Willmar, United States

Last updated: June 24, 2025

In January, the average temperature in Willmar, United States hovers around -10°C (15°F), but be prepared for extreme fluctuations—minimal temperatures can plunge to -35°C (-30°F), while maximums may reach up to 8°C (47°F). Expect light precipitation of approximately 20 mm (0.8 in) spread over 4 days, and embrace the crisp air with an average humidity of 85%.

January Temperature in Willmar

In January in Willmar, the average temperature is -10°C (15°F). Maximum temperatures can reach 8°C (47°F), while the minimum can drop as low as -35°C (-30°F). Be prepared for extreme cold conditions when traveling during this month.

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

The chart illustrates January temperature patterns in Willmar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willmar, January typically has an average temperature of -10°C (15°F), with highs reaching up to 8°C (47°F) and lows dropping to around -35°C (-30°F).

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

January Precipitation in Willmar

In Willmar in January, the total precipitation amount is 20 mm (0.8 in) spread over a period of 4 days.

January Precipitation Trends in Willmar

The chart displays monthly precipitation patterns in Willmar, 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 Willmar, January typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 4 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 Willmar

In Willmar in January humidity is 85%. With an average temperature of -10°C (15°F), this humidity feels like an uncomfortable chill that cuts through layers of clothing, making it challenging to enjoy outdoor activities or explore the area comfortably.

January Average Humidity in Willmar

This chart illustrates the average monthly humidity levels in Willmar, 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 Willmar 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 Willmar

In Willmar 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 Willmar, you can check the information here.

Maximum UV Index Levels in Willmar for January

The chart shows the monthly maximum UV Index (UVI) for Willmar 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 Willmar typically reaches 3, which falls under the moderate exposure category.

Data source: Willmar 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 Willmar Compares to Other Months

Weather in Willmar varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Willmar, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Willmar, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (15°F)	20 mm (0.8 inches)	85%	moderate
February Weather	-10°C (15°F)	22 mm (0.9 inches)	89%	moderate
March Weather	0°C (32°F)	54 mm (2.1 inches)	81%	high
April Weather	6°C (42°F)	76 mm (3.0 inches)	82%	high
May Weather	15°C (59°F)	107 mm (4.2 inches)	76%	very high
June Weather	22°C (72°F)	92 mm (3.6 inches)	81%	very high
July Weather	23°C (74°F)	105 mm (4.1 inches)	82%	very high
August Weather	21°C (70°F)	149 mm (5.9 inches)	83%	very high
September Weather	17°C (64°F)	115 mm (4.5 inches)	82%	high
October Weather	8°C (47°F)	96 mm (3.8 inches)	82%	moderate
November Weather	0°C (33°F)	26 mm (1.0 inches)	87%	moderate
December Weather	-5°C (23°F)	39 mm (1.5 inches)	84%	low