Duluth
Minnesota, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Duluth, MN

A dusk view of bright neon lights in Duluth, Minnesota, and a clear view of the lit Aerial Lift Bridge, and two long piers with lighthouses at the ends
A dusk view of bright neon lights in Duluth, Minnesota, and a clear view of the lit Aerial Lift Bridge, and two long piers with lighthouses at the ends
January, the same as December, in Duluth, Minnesota, is a freezing cold winter month, with average temperature varying between 18.9°F (-7.3°C) and 1.6°F (-16.9°C). The coldest month is January, with an average high-temperature of 18.9°F (-7.3°C) and an average low-temperature of 1.6°F (-16.9°C). Weather in January »
The last month of the winter, February, is another freezing cold month in Duluth, Minnesota, with average temperature fluctuating between 6.1°F (-14.4°C) and 24.1°F (-4.4°C). In February, the average high-temperature is essentially the same as in January - a still freezing cold 24.1°F (-4.4°C). Weather in February »

March, the first month of the spring, in Duluth, is a wintry month, with temperature in the range of an average high of 34.3°F (1.3°C) and an average low of 17.4°F (-8.1°C). In March, the average high-temperature rises, from a subzero cold 24.1°F (-4.4°C) in February, to a cold 34.3°F (1.3°C). Weather in March »

April is a frosty spring month in Duluth, Minnesota, with average temperature varying between 49.3°F (9.6°C) and 30°F (-1.1°C). In April, the average high-temperature significantly increases, from a cold 34.3°F (1.3°C) in March, to a chilly 49.3°F (9.6°C). Weather in April »

May, the last month of the spring, in Duluth, is a comfortable month, with average temperature fluctuating between 40.6°F (4.8°C) and 62.2°F (16.8°C). In May, the average high-temperature increases, from a frosty 49.3°F (9.6°C) in April, to a comfortable 62.2°F (16.8°C). Weather in May »

June, the first month of the summer, in Duluth, is a pleasant month, with average temperature varying between 70.9°F (21.6°C) and 49.3°F (9.6°C). In June, the average high-temperature marginally rises, from a comfortable 62.2°F (16.8°C) in May, to a pleasant 70.9°F (21.6°C). Weather in June »

July is a moderately hot summer month in Duluth, Minnesota, with average temperature ranging between max 76.3°F (24.6°C) and min 55.4°F (13°C). The warmest month is July, with an average high-temperature of 76.3°F (24.6°C) and an average low-temperature of 55.4°F (13°C). Weather in July »

August, the last month of the summer, in Duluth, is another warm month, with temperature in the range of an average high of 74.3°F (23.5°C) and an average low of 54.3°F (12.4°C). In Duluth, the average high-temperature is almost the same as in July - a still warm 74.3°F (23.5°C). Weather in August »

September, the first month of the autumn, in Duluth, is also an enjoyable month, with average temperature ranging between max 64.9°F (18.3°C) and min 46°F (7.8°C). In Duluth, Minnesota, the average high-temperature in September decreases, from a warm 74.3°F (23.5°C) in August, to an enjoyable 64.9°F (18.3°C). Weather in September »

October, like September, in Duluth, Minnesota, is another fresh autumn month, with average temperature fluctuating between 51.4°F (10.8°C) and 34.9°F (1.6°C). In Duluth, the average high-temperature decreases, from an enjoyable 64.9°F (18.3°C) in September, to a fresh 51.4°F (10.8°C). Weather in October »

The last month of the autumn, November, is another cold month in Duluth, Minnesota, with average temperature varying between 21.9°F (-5.6°C) and 35.6°F (2°C). In November, the average high-temperature significantly decreases, from a cool 51.4°F (10.8°C) in October, to a cold 35.6°F (2°C). Weather in November »

December, the first month of the winter, in Duluth, is still a freezing cold month, with average temperature ranging between min 7.3°F (-13.7°C) and max 22.3°F (-5.4°C). In December, the average high-temperature decreases, from a cold 35.6°F (2°C) in November, to a subzero cold 22.3°F (-5.4°C). Weather in December »

What is the coldest month in Duluth?

With an average high-temperature of 18.9°F (-7.3°C) and an average low-temperature of 1.6°F (-16.9°C), January is the coldest month.

How much does it rain in Duluth?

In Duluth, Minnesota, during the entire year, the rain falls for 131.4 days and collects up to 31" (786.3mm) of precipitation.

When does it snow in Duluth?

Months with snowfall in Duluth are January through May, September through December.

How much does it snow in Duluth?

In Duluth, during the entire year, snow falls for 60.6 days, and aggregates up to 86.1" (2187.1mm) of snow.

When does it snow the most in Duluth?

The month with the most snowfall in Duluth, Minnesota, is January when snow falls for 12.9 days and typically aggregates up to 19.4" (492.8mm) of snow.

What months are the ocean coldest in Duluth?

Through and April, with an average ocean temperature of 35.6°F (2°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.

What is the month with the lowest UV index in Duluth?

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

What is the driest month in Duluth?

The month with the least rainfall is February when the rain falls for 8.5 days and typically collects 0.8" (20.6mm) of precipitation.

What is the least humid month in Duluth?

The least humid month in Duluth, Minnesota, is May, with an average relative humidity of 62.7%.

What is the rainiest month in Duluth?

The month with the most rainfall in Duluth is June when the rain falls for 12.6 days and typically aggregates up to 4.2" (107.4mm) of precipitation.

When are the longest days in Duluth?

June has the longest days of the year, with an average of 15.8h of daylight.

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

Months with the highest UV index in Duluth, Minnesota, are June and July, with an average maximum UV index of 8.

What is the warmest month in Duluth?

The warmest month in Duluth, Minnesota, is July, with an average high-temperature of 76.3°F (24.6°C) and an average low-temperature of 55.4°F (13°C).

What month has the most sunshine in Duluth?

July has the most sunshine of the year in Duluth, with an average of 9.9h of sunshine.

What month is the ocean warmest in Duluth?

The month with the warmest seawater in Duluth, Minnesota, is August, with an average ocean temperature of 60.8°F (16°C). For most, swimming in 60.8°F (16°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the month with the least sunshine in Duluth?

November and December, with an average of 3.3h of sunshine, are months with the least sunshine in Duluth, Minnesota.

What is the most humid month in Duluth?

The most humid month is December, with an average relative humidity of 76.3%.

What is the month with the shortest days in Duluth?

With an average of 8.6h of daylight, December has the shortest days of the year.
Average humidity - Duluth, MN
Average rainfall - Duluth, MN
Average rainfall days - Duluth, MN

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 - Duluth, MN
Average snowfall days - Duluth, MN

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 - Duluth, MN

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 / Average sunshine - Duluth, MN

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

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