August weather forecastDuluth, MN
August
Weather in August
August in Duluth holds onto the summer weather, even though the temperatures show a slight decline from the previous month. The month signals the end of the warmest time of the year, preparing for a transition toward the cooler autumn temperatures. Mirroring July's pattern, the city maintains lengthy daylight periods, contributes to the continuity of outdoor activities. Despite dwindling temperatures, the sea remains suitably warm throughout the month. Signifying the onset of autumn, August average high temperature drops slightly to 75.7°F (24.3°C).Temperature
The introduction of August notes a subtle temperature variation to a still moderately hot 75.7°F (24.3°C) from July's 77.4°F (25.2°C). Duluth, in the month of August, anticipates a consistent average low-temperature of 56.5°F (13.6°C).Humidity
The average relative humidity in August is 76%.Rainfall
In Duluth, during August, the rain falls for 14.7 days and regularly aggregates up to 2.44" (62mm) of precipitation. Throughout the year, there are 135.2 rainfall days, and 24.53" (623mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Duluth, Minnesota.Ocean temperature
August is the month with the warmest seawater, with an average ocean temperature of 60.8°F (16°C).Note: For the majority, swimming in water with a temperature of 60.8°F (16°C) is not enjoyable. The difficulty in managing breathing rises as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
In August, the average length of the day in Duluth, Minnesota, is 14h and 9min.On the first day of the month, sunrise is at 5:49 am and sunset at 8:39 pm. On the last day of August, in Duluth, sunrise is at 6:27 am and sunset at 7:49 pm CDT.
Sunshine
In August, the average sunshine in Duluth is 9.6h.UV index
In Duluth, the average daily maximum UV index in August is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 5 during August translates into the following recommendations:
Take precautions - Protection against sunburn is recommended. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. 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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in August
Duluth, MN
- Average high temperature in August: 75.7°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 August: 56.5°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 August
Duluth, MN
- Average pressure in August: 29.93"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 August
Duluth, MN
- Average wind speed in August: 6.6mph
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 August
Duluth, MN
- Average humidity in August: 76%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (72%).
Average rainfall in August
Duluth, MN
- Average rainfall in August: 2.44"
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 August
Duluth, MN
- Average rainfall days in August: 14.7 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 August
Duluth, MN
- Average snowfall in August: 0"
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 August
Duluth, MN
- Average snowfall days in August: 0 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 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).
The 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: 14h and 6min
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 August: 9h and 36min
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 August
Duluth, MN
- Average sunshine days in August: 13 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 August
Duluth, MN
- Average UV index in August: 5
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 August
Duluth, MN
- Average cloud cover in August: 35
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 August
Duluth, MN
- Average visibility in August: 6mi
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).
