January Weather in Willoughby, United States

Last updated: June 24, 2025

In Willoughby, United States, the average temperature in January hovers around -1°C (31°F). However, be prepared for a range of conditions, as temperatures can dip as low as -20°C (-4°F) or rise to 12°C (55°F). This month also sees 100 mm (3.9 in) of precipitation spread over 16 days, contributing to an average humidity of 88%. Be sure to dress warmly and stay dry!

January Temperature in Willoughby

In January in Willoughby, the average temperature is -1°C (31°F). Maximums can reach 12°C (55°F), while minimums can drop as low as -20°C (-4°F). Be prepared for a wide range of temperatures if you're traveling during this time!

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

The chart illustrates January temperature patterns in Willoughby, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Willoughby, January typically has an average temperature of -1°C (31°F), with highs reaching up to 12°C (55°F) and lows dropping to around -20°C (-4°F).

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

January Precipitation in Willoughby

In Willoughby in January, the total precipitation amount reaches 100 mm (3.9 in) over the course of 16 days.

January Precipitation Trends in Willoughby

The chart displays monthly precipitation patterns in Willoughby, 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 Willoughby, January typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 16 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 Willoughby

In Willoughby 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 Willoughby

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

In Willoughby 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 Willoughby, you can check the information here.

Maximum UV Index Levels in Willoughby for January

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

Data source: Willoughby 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 Willoughby Compares to Other Months

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

This table compares monthly weather conditions in Willoughby, 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)	100 mm (3.9 inches)	88%	moderate
February Weather	-1°C (31°F)	100 mm (3.9 inches)	88%	moderate
March Weather	2°C (35°F)	97 mm (3.8 inches)	87%	high
April Weather	6°C (43°F)	114 mm (4.5 inches)	87%	very high
May Weather	12°C (54°F)	112 mm (4.4 inches)	81%	very high
June Weather	19°C (66°F)	92 mm (3.6 inches)	83%	very high
July Weather	23°C (73°F)	104 mm (4.1 inches)	82%	very high
August Weather	23°C (73°F)	77 mm (3.0 inches)	76%	very high
September Weather	20°C (68°F)	91 mm (3.6 inches)	77%	very high
October Weather	15°C (59°F)	139 mm (5.5 inches)	82%	high
November Weather	7°C (44°F)	137 mm (5.4 inches)	89%	moderate
December Weather	3°C (37°F)	115 mm (4.5 inches)	86%	low