January weather forecast
Duluth, MN

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The lit Aerial Lift Bridge and two long piers with lighthouses at the ends in Duluth, Minnesota
The lit Aerial Lift Bridge and two long piers with lighthouses at the ends in Duluth, Minnesota

Weather in January

January in Duluth, Minnesota, exhibits the rigors of winter, endowed with copious amounts of snowfall. The chilly weather continues from the latter weeks of the previous year, the mercury seldom rising above the freezing point. The amount of daylight is limited, making for brief, often overcast days. Prolonged outdoor activities could be hampered by low visibility on particularly snowy days. Recorded snowfall traverses from 6.06" (154mm) at the beginning to 6.5" (165mm) by the end of the month.

Temperature

In Duluth, the lowest temperatures are generally noted in January, averaging a high of 16.3°F (-8.7°C) and a low of 3.9°F (-15.6°C).

Humidity

January is the most humid month in Duluth, with an average relative humidity of 91%.

Rainfall

January is the month with the least rainfall. Rain falls for 3.4 days and accumulates 0.87" (22mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Duluth, Minnesota, in January, during 20.1 snowfall days, 6.06" (154mm) of snow is typically accumulated. Throughout the year, there are 90.9 snowfall days, and 33.27" (845mm) of snow is accumulated.

Ocean temperature

The months with the coldest seawater in Duluth are January through April, with an average ocean temperature of 35.6°F (2°C).
Note: In relation to swimming, this scenario is excessively cold, perilous, and a direct threat to life. Hypothermia strikes rapidly in the absence of insulated waterproof gear.

Daylight

In Duluth, the average length of the day in January is 9h and 3min.
On the first day of the month, sunrise is at 7:53 am and sunset at 4:30 pm. On the last day of January, sunrise is at 7:34 am and sunset at 5:09 pm CST.

Sunshine

With an average of 2.8h of sunshine, January has the least sunshine of the year in Duluth.

UV index

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Duluth, Minnesota. A UV Index estimate of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, the UV index of 1 transforms into the following advice:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What month is the coldest in Duluth?

With average temperatures fluctuating between a high of 16.3°F (-8.7°C) and a low of 3.9°F (-15.6°C), January stands out as the coldest month.

How cold is it in Duluth in January?

In Duluth, in January, the average high-temperature is 16.3°F (-8.7°C), and the average low-temperature is 3.9°F (-15.6°C).

What is the most humid month in Duluth?

With an average relative humidity of 91%, January is the most humid month in Duluth, Minnesota.

What is the average humidity in January in Duluth?

In January, the average relative humidity in Duluth, Minnesota, is 91%.

What is the driest month in Duluth?

January is the month with the least rainfall. Rain falls for 3.4 days and accumulates 0.87" (22mm) of precipitation.

How much does it rain in Duluth in January?

In Duluth, during January, the rain falls for 3.4 days and regularly aggregates up to 0.87" (22mm) of precipitation.

How many days does it snow in January in Duluth?

In Duluth, in January, snow falls for 20.1 days, with typically accumulated 6.06" (154mm) of snow.

What are the months with the coldest ocean in Duluth?

January through April, with an average ocean temperature of 35.6°F (2°C), are months with the coldest seawater in Duluth, Minnesota.

What is the water temperature in January in Duluth?

In Duluth, Minnesota, the average seawater temperature in January is 35.6°F (2°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

How many hours of daylight does Duluth have in January?

In Duluth, Minnesota, the average day length in January is 9h and 3min.

What time are sunrise and sunset in January in Duluth?

In January, on the first day of the month, sunrise is at 7:53 am and sunset at 4:30 pm. On the last day of the month, in Duluth, sunrise is at 7:34 am and sunset at 5:09 pm CST.

What is the month with the least sunshine in Duluth?

January has the least sunshine of the year, with an average of 2.8h of sunshine.

How many hours of sunshine does Duluth have in January?

In January, the average sunshine duration in Duluth is 2.8h.

What are the months with the lowest UV index in Duluth?

The months with the lowest UV index in Duluth, Minnesota, are January, February, November and December, with an average maximum UV index of 1.

What is the UV index reading in January in Duluth?

In Duluth, the average daily maximum UV index in January is 1. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
22.1°F -5.5°C
16.3°F -8.7°C
21°F -6.1°C
Average low temperature
11.8°F -11.2°C
3.9°F -15.6°C
7.3°F -13.7°C
Average pressure
30.09" 764mmHg
30.1" 765mmHg
30.12" 765mmHg
Average wind speed
8.3mph 13.4km/h
8.5mph 13.7km/h
8.5mph 13.7km/h
Average max. wind speed
8.9mph 14.3km/h
9mph 14.5km/h
9.1mph 14.6km/h
Average wind speed gusts
12.6mph 20.3km/h
13.1mph 21.1km/h
13.1mph 21.1km/h
Average humidity
89%
91%
90%
Average rainfall
1.69" 43mm
0.87" 22mm
0.98" 25mm
Average rainfall days
5.2
3.4
3.3
Average snowfall
7.72" 196mm
6.06" 154mm
6.5" 165mm
Average snowfall days
18.4
20.1
18.1
Average sea temperature
37°F 2.8°C
36°F 2.2°C
36°F 2.2°C
Average daylight
8h 4min
9h 0min
10h 2min
Average sunshine
3h 0min
2h 5min
3h 0min
Average sunshine days
11.7
12.2
10.4
Average UV index
1
1
1
Average cloud cover
70%
72%
71%
Average visibility
4mi 6.4km
4mi 6.4km
4mi 6.4km

Average temperature in January
Duluth, MN

Average temperature in January - Duluth, MN
  • Average high temperature in January: 16.3°F

The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is January (16.3°F).

  • Average low temperature in January: 3.9°F

The month with the highest average low temperature is July (57.6°F).
The coldest month (with the lowest average low temperature) is January (3.9°F).

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Average pressure in January
Duluth, MN

Average pressure in January - Duluth, MN
  • Average pressure in January: 30.1"Hg

The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in January
Duluth, MN

Average wind speed in January - Duluth, MN
  • Average wind speed in January: 8.5mph

The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).

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Average humidity in January
Duluth, MN

Average humidity in January - Duluth, MN
  • Average humidity in January: 91%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in January
Duluth, MN

Average rainfall in January - Duluth, MN
  • Average rainfall in January: 0.87"

The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is January (0.87").

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Average rainfall days in January
Duluth, MN

Average rainfall days in January - Duluth, MN
  • Average rainfall days in January: 3.4 days

The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in January
Duluth, MN

Average snowfall in January - Duluth, MN
  • Average snowfall in January: 6.06"

The month with the highest snowfall is December (7.72").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Duluth, MN

Average snowfall days in January - Duluth, MN
  • Average snowfall days in January: 20.1 days

The month with the highest number of snowfall days is January (20.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in January
Duluth, MN

Average sea temperature in January - Duluth, MN
  • Average sea temperature in January: 36°F

The best month for swimming (with the highest average sea temperature) is August (61°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (36°F).

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Average daylight in January /
Average sunshine in January
Duluth, MN

Average daylight in January / Average sunshine in January - Duluth, MN
  • Average daylight in January: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in January: 2h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

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Average sunshine days in January
Duluth, MN

Average sunshine days in January - Duluth, MN
  • Average sunshine days in January: 12.2 days

The month with the most sunshine days is November (13.7 days).
The month with the least sunshine days is June (10.1 days).

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Average UV index in January
Duluth, MN

Average UV index in January - Duluth, MN
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in January
Duluth, MN

Average cloud cover in January - Duluth, MN
  • Average cloud cover in January: 72

The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in January
Duluth, MN

Average visibility in January - Duluth, MN
  • Average visibility in January: 4mi

The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).

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Duluth, Minnesota, USA

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