January Weather in Marathon, United States

Last updated: June 24, 2025

In January, the average temperature in Marathon, United States hovers around -9°C (17°F). Expect chilly extremes, with minimum temperatures dipping to -32°C (-25°F) and maximums reaching 7°C (45°F). The month sees 34 mm (1.3 in) of precipitation over 6 days, contributing to an average humidity of 89%. Bundle up and prepare for a brisk, wintry atmosphere!

January Temperature in Marathon

In January in Marathon, the average temperature is -9°C (17°F). The maximum can reach 7°C (45°F) and the minimum can be as low as -32°C (-25°F). Be prepared for extreme cold temperatures and dress warmly if you're traveling during this time.

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

The chart illustrates January temperature patterns in Marathon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marathon, January typically has an average temperature of -9°C (17°F), with highs reaching up to 7°C (45°F) and lows dropping to around -32°C (-25°F).

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

January Precipitation in Marathon

In Marathon in January, the total precipitation amount is 34 mm (1.3 in) spread over 6 days.

January Precipitation Trends in Marathon

The chart displays monthly precipitation patterns in Marathon, 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 Marathon, January typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 6 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 Marathon

In Marathon in January, humidity is 89%. With an average temperature of -9°C (17°F), this humidity feels like an unpleasant chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm while battling the damp air.

January Average Humidity in Marathon

This chart illustrates the average monthly humidity levels in Marathon, 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 Marathon is approximately 89%, 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 Marathon

In Marathon 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 Marathon, you can visit Hourly UV Index in Marathon.

Maximum UV Index Levels in Marathon for January

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

Data source: Marathon 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 Marathon Compares to Other Months

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

This table compares monthly weather conditions in Marathon, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (17°F)	34 mm (1.3 inches)	89%	low
February Weather	-8°C (17°F)	50 mm (2.0 inches)	90%	moderate
March Weather	-1°C (31°F)	53 mm (2.1 inches)	87%	moderate
April Weather	5°C (42°F)	98 mm (3.9 inches)	84%	high
May Weather	13°C (56°F)	103 mm (4.1 inches)	77%	very high
June Weather	19°C (67°F)	102 mm (4.0 inches)	75%	very high
July Weather	22°C (71°F)	117 mm (4.6 inches)	74%	very high
August Weather	19°C (67°F)	121 mm (4.8 inches)	73%	very high
September Weather	16°C (61°F)	83 mm (3.3 inches)	78%	high
October Weather	8°C (47°F)	109 mm (4.3 inches)	84%	moderate
November Weather	0°C (32°F)	50 mm (2.0 inches)	89%	moderate
December Weather	-5°C (23°F)	52 mm (2.1 inches)	87%	low