July weather forecast
Duluth, MN

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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 July

July stands as the climatic culmination of summer in Duluth, characterized by the year's hottest temperatures and longest hours of sunshine. The city basks in warm weather, paving the way for a myriad of outdoor activities. This period's warm, comforting temperatures also cause a considerable surge in sea temperature. Accompanied by the highest UV index of the year, July requires extra precautions against sunburns. Coincidentally, July's average high temperature recorded is the year's highest at 77.4°F (25.2°C).

Temperature

July, on average, is the warmest month in Duluth, registering a high temperature of 77.4°F (25.2°C) and a low of 57.6°F (14.2°C).

Humidity

The average relative humidity in July in Duluth is 75%.

Rainfall

The month with the most rainfall in Duluth is July, when the rain falls for 16.4 days and typically aggregates up to 3.03" (77mm) of precipitation.

Snowfall

In Duluth, snow does not fall in June through September.

Ocean temperature

In Duluth, in July, the average water temperature is 48.2°F (9°C).
Note: Immersing oneself in 48.2°F (9°C) at sub14°F (-10°C) temperatures is a recipe for harsh cold shock and quickened breathing unless adequately equipped.

Daylight

In July, the average length of the day in Duluth is 15h and 25min.
On the first day of the month, sunrise is at 5:18 am and sunset at 9:06 pm. On the last day of July, sunrise is at 5:48 am and sunset at 8:41 pm CDT.

Sunshine

The month with the most sunshine is July, with an average of 10h of sunshine.

UV index

July is the month with the highest UV index in Duluth, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A maximum UV index of 6 in July translates into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What is the hottest time of year in Duluth?

In Duluth, July registers the highest temperatures, averaging 77.4°F (25.2°C) at the peak and 57.6°F (14.2°C) at the lowest.

What is the temperature in July in Duluth?

During July, Duluth experiences an average high-temperature of 77.4°F (25.2°C) and a low-temperature of 57.6°F (14.2°C).

What is the average humidity in July in Duluth?

In Duluth, the average relative humidity in July is 75%.

What is the rainiest month in Duluth?

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

How many days does it rain in July in Duluth?

In Duluth, Minnesota, in July, during 16.4 rainfall days, 3.03" (77mm) of precipitation is typically accumulated.

When it does not snow in Duluth?

June through September are months without snowfall in Duluth, Minnesota.

What is the water temperature in July in Duluth?

In Duluth, Minnesota, the average seawater temperature in July is 48.2°F (9°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

How many hours of daylight does Duluth have in July?

In July, the average day length in Duluth is 15h and 25min.

When are sunrise and sunset in July in Duluth?

On the first day of July, sunrise is at 5:18 am and sunset at 9:06 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:41 pm CDT.

What month has the most sunshine in Duluth?

The month with the most sunshine in Duluth is July, with an average of 10h of sunshine.

How many hours of sunshine does Duluth have in July?

In July, the average sunshine duration is 10h.

When is the highest UV index in Duluth?

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

What is the UV index reading in July in Duluth?

In July, the average daily maximum UV index in Duluth is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
70.3°F 21.3°C
77.4°F 25.2°C
75.7°F 24.3°C
Average low temperature
50.9°F 10.5°C
57.6°F 14.2°C
56.5°F 13.6°C
Average pressure
29.89" 759mmHg
29.92" 760mmHg
29.93" 760mmHg
Average wind speed
7.3mph 11.7km/h
6.6mph 10.6km/h
6.6mph 10.6km/h
Average max. wind speed
7.8mph 12.6km/h
7.1mph 11.4km/h
7.1mph 11.4km/h
Average wind speed gusts
11.8mph 19km/h
10.7mph 17.2km/h
10.6mph 17.1km/h
Average humidity
76%
75%
76%
Average rainfall
2.99" 76mm
3.03" 77mm
2.44" 62mm
Average rainfall days
17.3
16.4
14.7
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
39°F 3.9°C
48°F 8.9°C
61°F 16.1°C
Average daylight
15h 5min
15h 2min
14h 1min
Average sunshine
9h 2min
10h 0min
9h 4min
Average sunshine days
10.1
11.6
13
Average UV index
5
6
5
Average cloud cover
40%
34%
35%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in July
Duluth, MN

Average temperature in July - Duluth, MN
  • Average high temperature in July: 77.4°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 July: 57.6°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).

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Average pressure in July
Duluth, MN

Average pressure in July - Duluth, MN
  • Average pressure in July: 29.92"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).

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Average wind speed in July
Duluth, MN

Average wind speed in July - Duluth, MN
  • Average wind speed in July: 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).

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Average humidity in July
Duluth, MN

Average humidity in July - Duluth, MN
  • Average humidity in July: 75%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (72%).

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Average rainfall in July
Duluth, MN

Average rainfall in July - Duluth, MN
  • Average rainfall in July: 3.03"

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 in July
Duluth, MN

Average rainfall days in July - Duluth, MN
  • Average rainfall days in July: 16.4 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).

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Average snowfall in July
Duluth, MN

Average snowfall in July - Duluth, MN
  • Average snowfall in July: 0"

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 in July
Duluth, MN

Average snowfall days in July - Duluth, MN
  • Average snowfall days in July: 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).

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Average sea temperature in July
Duluth, MN

Average sea temperature in July - Duluth, MN
  • Average sea temperature in July: 48°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).

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Average daylight in July /
Average sunshine in July
Duluth, MN

Average daylight in July / Average sunshine in July - Duluth, MN
  • Average daylight in July: 15h and 2min

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 July: 10h and 0min

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 in July
Duluth, MN

Average sunshine days in July - Duluth, MN
  • Average sunshine days in July: 11.6 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).

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Average UV index in July
Duluth, MN

Average UV index in July - Duluth, MN
  • Average UV index in July: 6

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).

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Average cloud cover in July
Duluth, MN

Average cloud cover in July - Duluth, MN
  • Average cloud cover in July: 34

The month with the most cloud cover is January (Cloud cover 72).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in July
Duluth, MN

Average visibility in July - Duluth, MN
  • Average visibility in July: 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).

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Duluth, Minnesota, USA

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