January Weather in Ontonagon, United States

Last updated: June 24, 2025

In Ontonagon, United States, the average temperature in January hovers around -8°C (18°F). During this chillier season, temperatures can plummet to a minimum of -27°C (-16°F), while peaking at a maximum of 7°C (44°F). Expect precipitation to total approximately 44 mm (1.7 in) spread across 12 days, contributing to an average humidity of a crisp 92%.

January Temperature in Ontonagon

In January in Ontonagon, the average temperature is -8°C (18°F). Maximums can reach 7°C (44°F) and minimums can be as low as -27°C (-16°F). Travelers should be prepared for extremely cold conditions and dress accordingly to stay warm.

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

The chart illustrates January temperature patterns in Ontonagon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ontonagon, January typically has an average temperature of -8°C (18°F), with highs reaching up to 7°C (44°F) and lows dropping to around -27°C (-16°F).

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

January Precipitation in Ontonagon

In Ontonagon in January, the total precipitation amounts to 44 mm (1.7 in) over the course of 12 days.

January Precipitation Trends in Ontonagon

The chart displays monthly precipitation patterns in Ontonagon, 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 Ontonagon, January typically receives around 44 mm (1.7 inches) of precipitation spread over approximately 12 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 Ontonagon

In Ontonagon in January humidity is 92%. With an average temperature of -8°C (18°F), this humidity feels like a bone-chilling embrace that makes every breath feel heavy, creating a stark contrast between the icy air and the dampness that clings to your skin, making travel uncomfortable and invigorating all at once.

January Average Humidity in Ontonagon

This chart illustrates the average monthly humidity levels in Ontonagon, 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 Ontonagon is approximately 92%, 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 Ontonagon

In Ontonagon in January, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Ontonagon, you can visit Hourly UV Index in Ontonagon.

Maximum UV Index Levels in Ontonagon for January

The chart shows the monthly maximum UV Index (UVI) for Ontonagon 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 Ontonagon typically reaches 2, which falls under the low exposure category.

Data source: Ontonagon 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 Ontonagon Compares to Other Months

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

This table compares monthly weather conditions in Ontonagon, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (18°F)	44 mm (1.7 inches)	92%	low
February Weather	-9°C (17°F)	60 mm (2.3 inches)	92%	moderate
March Weather	-2°C (28°F)	54 mm (2.1 inches)	88%	moderate
April Weather	3°C (38°F)	82 mm (3.2 inches)	86%	high
May Weather	12°C (54°F)	71 mm (2.8 inches)	78%	very high
June Weather	18°C (64°F)	90 mm (3.5 inches)	74%	very high
July Weather	21°C (69°F)	77 mm (3.0 inches)	70%	very high
August Weather	19°C (66°F)	111 mm (4.4 inches)	71%	very high
September Weather	15°C (60°F)	92 mm (3.6 inches)	74%	high
October Weather	8°C (46°F)	118 mm (4.6 inches)	81%	moderate
November Weather	0°C (31°F)	72 mm (2.8 inches)	86%	moderate
December Weather	-5°C (24°F)	78 mm (3.1 inches)	90%	low