January Weather in Duluth, United States

Last updated: June 24, 2025

In January, the average temperature in Duluth, United States hovers around 7°C (45°F), with a range that can dip as low as -11°C (12°F) and peak at a pleasant 24°C (76°F). Expect a total precipitation of 112 mm (4.4 in) spread over 9 days, accompanied by a notable average humidity of 86%. Prepare for a month where cool breezes meet occasional rain!

January Temperature in Duluth

In January, in Duluth, the average temperature is 7°C (45°F). The maximum can reach 24°C (76°F) and the minimum can be as low as -11°C (12°F). It's advisable to pack layers for your trip to Duluth during this month, as temperatures can vary significantly throughout the day.

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

The chart illustrates January temperature patterns in Duluth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Duluth, January typically has an average temperature of 7°C (45°F), with highs reaching up to 24°C (76°F) and lows dropping to around -11°C (12°F).

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

January Precipitation in Duluth

In Duluth in January, the total precipitation amount is 112 mm (4.4 in), occurring over a span of 9 days.

January Precipitation Trends in Duluth

The chart displays monthly precipitation patterns in Duluth, 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 Duluth, January typically receives around 112 mm (4.4 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 Duluth

In Duluth in January, humidity is 86%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and necessitating cozy layers to stay warm while navigating the moist air.

January Average Humidity in Duluth

This chart illustrates the average monthly humidity levels in Duluth, 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 Duluth is approximately 86%, 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 Duluth

In Duluth 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 Duluth for better planning.

Maximum UV Index Levels in Duluth for January

The chart shows the monthly maximum UV Index (UVI) for Duluth 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 Duluth typically reaches 4, which falls under the moderate exposure category.

Data source: Duluth 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 Duluth Compares to Other Months

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

This table compares monthly weather conditions in Duluth, 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 (45°F)	112 mm (4.4 inches)	86%	moderate
February Weather	10°C (50°F)	160 mm (6.3 inches)	84%	high
March Weather	13°C (56°F)	142 mm (5.6 inches)	83%	very high
April Weather	16°C (62°F)	129 mm (5.1 inches)	81%	very high
May Weather	21°C (71°F)	116 mm (4.6 inches)	81%	extreme
June Weather	24°C (76°F)	134 mm (5.3 inches)	81%	extreme
July Weather	26°C (79°F)	118 mm (4.7 inches)	83%	extreme
August Weather	25°C (78°F)	156 mm (6.1 inches)	81%	very high
September Weather	23°C (74°F)	115 mm (4.5 inches)	82%	very high
October Weather	18°C (65°F)	140 mm (5.5 inches)	78%	very high
November Weather	11°C (52°F)	83 mm (3.3 inches)	86%	high
December Weather	9°C (48°F)	141 mm (5.5 inches)	89%	moderate