Climate and monthly weather forecast
Duluth, MN

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, the same as December, in Duluth, Minnesota, is another subzero cold winter month, with an average temperature ranging between max 16.3°F (-8.7°C) and min 3.9°F (-15.6°C). January is the coldest month, with an average high-temperature of 16.3°F (-8.7°C) and an average low-temperature of 3.9°F (-15.6°C). Weather in January »

Weather in February

The last month of the winter, February, is also a subzero cold month in Duluth, Minnesota, with temperature in the range of an average low of 7.3°F (-13.7°C) and an average high of 21°F (-6.1°C). In February, the average high-temperature is almost the same as in January - a still subzero cold 21°F (-6.1°C). Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Duluth, Minnesota, with an average temperature fluctuating between 21.4°F (-5.9°C) and 34°F (1.1°C). In March, the average high-temperature increases from a freezing cold 21°F (-6.1°C) in February to a cold 34°F (1.1°C). Weather in March »

Weather in April

April is a frosty spring month in Duluth, Minnesota, with an average temperature fluctuating between 46°F (7.8°C) and 31.3°F (-0.4°C). In Duluth, Minnesota, the average high-temperature in April rises from a wintry 34°F (1.1°C) in March to a frosty 46°F (7.8°C). Weather in April »

Weather in May

May, the last month of the spring in Duluth, is a comfortable month, with an average temperature fluctuating between 61°F (16.1°C) and 41.9°F (5.5°C). In Duluth, Minnesota, the average high-temperature in May soars, from a frosty 46°F (7.8°C) in April, to an enjoyable 61°F (16.1°C). Weather in May »

Weather in June

The first month of the summer, June, is an agreeable month in Duluth, Minnesota, with an average temperature ranging between max 70.3°F (21.3°C) and min 50.9°F (10.5°C). In June, the average high-temperature rises from an enjoyable 61°F (16.1°C) in May to a pleasant 70.3°F (21.3°C). Weather in June »

Weather in July

July is a moderately hot summer month in Duluth, Minnesota, with an average temperature ranging between max 77.4°F (25.2°C) and min 57.6°F (14.2°C). The warmest month is July, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 57.6°F (14.2°C). Weather in July »

Weather in August

August, the last month of the summer in Duluth, is another warm month, with an average temperature ranging between max 75.7°F (24.3°C) and min 56.5°F (13.6°C). In Duluth, the average high-temperature in August is relatively the same as in July - a still warm 75.7°F (24.3°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a comfortable month in Duluth, Minnesota, with temperature in the range of an average high of 67.1°F (19.5°C) and an average low of 49.1°F (9.5°C). In September, the average high-temperature slightly decreases from a moderately hot 75.7°F (24.3°C) in August to a comfortable 67.1°F (19.5°C). Weather in September »

Weather in October

October, like September, in Duluth, Minnesota, is another fresh autumn month, with an average temperature varying between 38.3°F (3.5°C) and 51.3°F (10.7°C). In Duluth, the average high-temperature in October significantly decreases from a comfortable 67.1°F (19.5°C) in September to a fresh 51.3°F (10.7°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cold month in Duluth, Minnesota, with an average temperature fluctuating between 25.5°F (-3.6°C) and 36.1°F (2.3°C). In Duluth, the average high-temperature in November significantly decreases from a cool 51.3°F (10.7°C) in October to a cold 36.1°F (2.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a freezing cold month in Duluth, Minnesota, with an average temperature ranging between max 22.1°F (-5.5°C) and min 11.8°F (-11.2°C). In December, the average high-temperature drops from a cold 36.1°F (2.3°C) in November to a freezing cold 22.1°F (-5.5°C). Weather in December »
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FAQ

What is the coldest month in Duluth?

January is the coldest month in Duluth, Minnesota, with an average high-temperature of 16.3°F (-8.7°C) and an average low-temperature of 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 driest month in Duluth?

The month with the least rainfall in Duluth is January, when the rain falls for 3.4 days and typically collects 0.87" (22mm) of precipitation.

How much does it rain in Duluth?

Throughout the year, in Duluth, there are 135.2 rainfall days, and 24.53" (623mm) of precipitation is accumulated.

When does it snow in Duluth?

January through May, October through December are months with snowfall in Duluth, Minnesota.

How much does it snow in Duluth?

In Duluth, during the entire year, snow falls for 90.9 days and aggregates up to 33.27" (845mm) of snow.

When is the ocean coldest in Duluth?

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

What is the month with the least sunshine in Duluth?

The month with the least sunshine is January, with an average of 2.8h of sunshine.

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

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

When is Daylight Saving Time (DST) in Duluth?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from CDT to CST.

What is the least humid month in Duluth?

May is the least humid month in Duluth, with an average relative humidity of 72%.

When it does not snow in Duluth?

June through September are months without snowfall.

When are the longest days in Duluth?

The month with the longest days in Duluth is June, with an average of 15h and 48min of daylight.

What is the warmest month in Duluth?

July is the warmest month in Duluth, Minnesota, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 57.6°F (14.2°C).

What is the rainiest month in Duluth?

July is the month with the most rainfall. Rain falls for 16.4 days and accumulates 3.03" (77mm) of precipitation.

What month has the most sunshine in Duluth?

With an average of 10h of sunshine, July has the most sunshine of the year in Duluth, Minnesota.

When is the highest UV index in Duluth?

July is the month with the highest UV index in Duluth, Minnesota, with an average maximum UV index of 6.

When is the ocean warmest in Duluth?

The month with the warmest seawater is August, with an average ocean temperature of 60.8°F (16°C).

When does it snow the most in Duluth?

December is the month with the most snowfall in Duluth. Snow falls for 18.4 days and accumulates 7.72" (196mm) of snow.

What is the month with the shortest days in Duluth?

December has the shortest days of the year, with an average of 8h and 37min of daylight.

Average pressure
Duluth, MN

Average pressure - Duluth, MN

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
Duluth, MN

Average wind speed - Duluth, MN

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 rainfall
Duluth, MN

Average rainfall - Duluth, MN

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
Duluth, MN

Average rainfall days - Duluth, MN

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
Duluth, MN

Average snowfall - Duluth, MN

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
Duluth, MN

Average snowfall days - Duluth, MN

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
Duluth, MN

Average sea temperature - Duluth, MN

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 / Average sunshine
Duluth, MN

Average daylight / Average sunshine - Duluth, MN

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 37min).

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
Duluth, MN

Average sunshine days - Duluth, MN

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 visibility
Duluth, MN

Average visibility - Duluth, MN

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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