August weather forecast and climate
Duluth, MN

What is the temperature in August in Duluth?

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

How many days does it rain in August in Duluth?

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

Does it snow in Duluth in August?

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

When is the sea warmest in Duluth?

Month with the warmest seawater is August, with an average sea temperature of 60.8°F (16°C). Swimming in 60.8°F (16°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the sea temperature in August in Duluth?

In Duluth, Minnesota, in August, the average water temperature 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).
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).

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