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

August 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
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).

Temperature

In Duluth, the average high-temperature is almost the same as in July - a still warm 74.3°F (23.5°C). In Duluth, Minnesota, the average low-temperature is 54.3°F (12.4°C).

Humidity

In August, the average relative humidity is 74.5%.

Rainfall

In Duluth, during 10.8 rainfall days, 3.7" (94mm) of precipitation is typically accumulated. Throughout the year, in Duluth, Minnesota, there are 131.4 rainfall days, and 31" (786.3mm) of precipitation is accumulated.

Snowfall

In Duluth, it doesn't snow. In September, it regularly snows. Throughout the year, 86.1" (2187.1mm) of snow is accumulated.

Ocean temperature

August is the month with the warmest seawater in Duluth, 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).

Daylight

In August, the average length of the day in Duluth is 14.1h.

Sunshine

The average sunshine in August is 8.4h.

UV index

In August, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high threat to health from the exposure to the Sun's UV rays for the average person.
The average daily UV index of 7 in August transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in August in Duluth?

In August, in Duluth, the average high-temperature is 74.3°F (23.5°C), and the average low-temperature is 54.3°F (12.4°C).

What is the average humidity in August in Duluth?

The average relative humidity in August in Duluth, Minnesota, is 74.5%.

How much does it rain in Duluth in August?

In Duluth, in August, during 10.8 rainfall days, 3.7" (94mm) of precipitation is typically accumulated.

Does it snow in Duluth in August?

In Duluth, Minnesota, in August, it doesn't snow. In September, it regularly snows.

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).

How cold is the water in August in Duluth?

In Duluth, Minnesota, the average seawater temperature in August is 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).

How many hours of daylight does Duluth have in August?

The average length of the day in August in Duluth, Minnesota, is 14.1h.

How many hours of sunshine does Duluth have in August?

In August, the average sunshine is 8.4h.

What is the UV index reading in August in Duluth?

In Duluth, the average daily maximum UV index in August is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in August - Duluth, MN
  • Average high temperature in August: 74.3°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 August: 54.4°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 August - Duluth, MN
  • Average humidity in August: 74.5%

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 August - Duluth, MN
  • Average rainfall in August: 3.7"

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 August - Duluth, MN
  • Average rainfall days in August: 10.8 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 August - Duluth, MN
  • Average snowfall in August: 0"

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 August - Duluth, MN
  • Average snowfall days in August: 0 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 August - Duluth, MN
  • Average sea temperature in August: 61°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 August / Average sunshine in August - Duluth, MN
  • Average daylight in August: 14.1h

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 August: 8.4h

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 August - Duluth, MN
  • Average UV index in August: 7

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).