December weather forecastDuluth, MN
December
Weather in December
December endures the peak of the winter season in Duluth, characterized by icy winds, copious snowfall, and minimal sunlight. Though officially the start of winter, the city experiences cold weather that sets new low-temperature records. The month's typically chilly atmosphere is further intensified with reduced sea temperatures. Daylight hours get truncated, leading to shorter days and longer, colder nights. Round off the year, the snowfall amount soars to a climatic 7.72" (196mm).Temperature
December comes with a drop in the average high-temperature, falling from November's cold 36.1°F (2.3°C) to a freezing cold 22.1°F (-5.5°C). In December, the nighttime temperature in Duluth lowers to an average of 11.8°F (-11.2°C).Humidity
The average relative humidity in December in Duluth is 89%.Rainfall
In Duluth, during December, the rain falls for 5.2 days and regularly aggregates up to 1.69" (43mm) of precipitation. Throughout the year, there are 135.2 rainfall days, and 24.53" (623mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall in Duluth. Snow falls for 18.4 days and accumulates 7.72" (196mm) of snow.Ocean temperature
In Duluth, in December, the average water temperature is 37.4°F (3°C).Note: In relation to swimming, the extreme cold, danger, and potential fatality of this situation are apparent. Without suitable insulated waterproof clothing, the onset of hypothermia is quick.
Daylight
December has the shortest days of the year, with an average of 8h and 36min of daylight.On the first day of December in Duluth, sunrise is at 7:33 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 4:30 pm CST.
Sunshine
In December, the average sunshine is 3h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.Note: The UV index of 1 during December translates into the following guidance:
Long-term sun exposure is typically not a concern for most. However, those with sensitive skin, infants, and children must always have protection. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Duluth, MN
- Average high temperature in December: 22.1°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 December: 11.8°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).
Average pressure in December
Duluth, MN
- Average pressure in December: 30.09"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).
Average wind speed in December
Duluth, MN
- Average wind speed in December: 8.3mph
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).
Average humidity in December
Duluth, MN
- Average humidity in December: 89%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (72%).
Average rainfall in December
Duluth, MN
- Average rainfall in December: 1.69"
The wettest month (with the highest rainfall) is July (3.03").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in December
Duluth, MN
- Average rainfall days in December: 5.2 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).
Average snowfall in December
Duluth, MN
- Average snowfall in December: 7.72"
The month with the highest snowfall is December (7.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Duluth, MN
- Average snowfall days in December: 18.4 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).
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).
The 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: 8h and 36min
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 December: 3h and 0min
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).
Average sunshine days in December
Duluth, MN
- Average sunshine days in December: 11.7 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).
Average UV index in December
Duluth, MN
- Average UV index in December: 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).
Average cloud cover in December
Duluth, MN
- Average cloud cover in December: 70
The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in December
Duluth, MN
- Average visibility in December: 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).
