December weather forecast and climate
Duluth, MN

What is the temperature in December in Duluth?

The average high-temperature, in December, in Duluth, Minnesota, is 22.3°F (-5.4°C), while the average low-temperature is 7.3°F (-13.7°C).

How much does it rain in Duluth in December?

In Duluth, Minnesota, in December, it is raining for 10.5 days, with typically 1.2" (30.7mm) of accumulated precipitation.

How many days does it snow in December in Duluth?

In December, it is snowing for 12.8 days. Throughout December, 17.7" (449.6mm) of snow is accumulated.

What is the water temperature in December in Duluth?

The average seawater temperature, in December, is 37.4°F (3°C). For swimming, this is considered very dangerous and immediately life-threatening. Total loss of breathing control instantly occurs, and clear thinking becomes almost impossible. A specialized swimsuit is obligatory to minimize thermal loss.
Average temperature in December - Duluth, MN
  • Average high temperature in December: 22.3°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (18.9°F).

  • Average low temperature in December: 7.3°F

The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is January (1.5°F).

Average humidity in December - Duluth, MN
  • Average humidity in December: 76.3%

The month with the highest relative humidity is December (76.3%).
The month with the lowest relative humidity is May (62.7%).

Average rainfall in December - Duluth, MN
  • Average rainfall in December: 1.2"

The wettest month (with the highest rainfall) is June (4.2").
The driest month (with the lowest rainfall) is February (0.8").

Average rainfall days in December - Duluth, MN
  • Average rainfall days in December: 10.5 days

The month with the highest number of rainy days is June (12.6 days).
The month with the lowest number of rainy days is February (8.5 days).

Average snowfall in December - Duluth, MN
  • Average snowfall in December: 17.7"

The month with the highest snowfall is January (19.4").
Months with the lowest snowfall are June, July and August (0").

Average snowfall days in December - Duluth, MN
  • Average snowfall days in December: 12.8 days

The month with the highest number of snowfall days is January (12.9 days).
Months with the lowest number of snowfall days are June, July and August (0 days).

Average sea temperature in December - Duluth, MN
  • Average sea temperature in December: 37°F

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

Average daylight in December / Average sunshine in December - Duluth, MN
  • Average daylight in December: 8.6h

The month with the longest days is June (Average daylight: 15.8h).
The month with shortest days is December (Average daylight: 8.6h).

  • Average sunshine in December: 3.3h

The month with most sunshine is July (Average sunshine: 9.9h).
Months with least sunshine are November and December (Average sunshine: 3.3).

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

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).

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