July weather forecast
Grand Portage, MN

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Weather in July

July brings the pinnacle of summer to Grand Portage with the peak temperature hitting a high of 70°F (21.1°C). The sea temperature also peaks encouraging recreational activities along the shore. Despite being the warmest month, the pleasant wind speed provides some respite. While rainfall stays mostly consistent, cloud coverage is at its lowest, enhancing the overall summer experience. The high UV index necessitates extra protection during long daylight hours.

Temperature

In Grand Portage, Minnesota, July and August are characterised by the peak of temperatures, recording an average high of 70°F (21.1°C).

Humidity

The average relative humidity in July is 75%.

Rainfall

In July, the rain falls for 12.9 days. Throughout July, 1.61" (41mm) of precipitation is accumulated. Throughout the year, there are 115 rainfall days, and 18.19" (462mm) of precipitation is accumulated.

Snowfall

In Grand Portage, snow does not fall in June through September.

Ocean temperature

In Grand Portage, in July, the average water temperature is 46.4°F (8°C).
Note: Diving into 46.4°F (8°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

In Grand Portage, the average length of the day in July is 15h and 34min.
On the first day of the month, sunrise is at 5:03 am and sunset at 9:01 pm. On the last day of July, sunrise is at 5:34 am and sunset at 8:35 pm CDT.

Sunshine

In July, the average sunshine in Grand Portage is 10.3h.

UV index

July is the month with the highest UV index, with an average maximum UV index of 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.
Note: In July, the average maximum UV index of 5 translates into the following recommendations:
Be vigilant - Preventing sunburn is recommended. It's recommended to limit sun exposure when its radiation is at its peak during midday. Opt for tightly woven and loose clothing to enhance protection from the Sun.
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Frequently asked questions

What time of the year is the hottest in Grand Portage?

Grand Portage experiences its warmest period in July and August, averaging a high-temperature of 70°F (21.1°C).

What are the temperatures in Grand Portage in July?

In July, the average high-temperature and low-temperature in Grand Portage, Minnesota, are 70°F (21.1°C) and 53.6°F (12°C) respectively.

What is the average humidity in July in Grand Portage?

In Grand Portage, Minnesota, the average relative humidity in July is 75%.

How many days does it rain in July in Grand Portage?

In Grand Portage, in July, during 12.9 rainfall days, 1.61" (41mm) of precipitation is typically accumulated.

When it does not snow in Grand Portage?

In Grand Portage, Minnesota, snow does not fall in June through September.

How cold is the water in July in Grand Portage?

In July, the average ocean temperature is 46.4°F (8°C). Swimming in 46.4°F (8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in July in Grand Portage?

The average day length in July in Grand Portage is 15h and 34min.

When are sunrise and sunset in July in Grand Portage?

On the first day of July in Grand Portage, sunrise is at 5:03 am and sunset at 9:01 pm. On the last day of the month, sunrise is at 5:34 am and sunset at 8:35 pm CDT.

How long on average sun shines in July in Grand Portage?

The average sunshine duration in July in Grand Portage, Minnesota, is 10.3h.

What is the month with the highest UV index in Grand Portage?

The month with the highest UV index is July, with an average maximum UV index of 5.

How high is the UV index in July in Grand Portage?

In July, the average daily maximum UV index in Grand Portage, Minnesota, is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJulyASOND
Jun
July
Aug
Average high temperature
62.2°F 16.8°C
70°F 21.1°C
70°F 21.1°C
Average low temperature
46°F 7.8°C
53.6°F 12°C
54.3°F 12.4°C
Average pressure
29.9" 759mmHg
29.91" 760mmHg
29.91" 760mmHg
Average wind speed
6.2mph 10km/h
6.3mph 10.1km/h
6.6mph 10.6km/h
Average max. wind speed
6.7mph 10.8km/h
6.9mph 11.1km/h
7.2mph 11.6km/h
Average wind speed gusts
10.7mph 17.2km/h
11.2mph 18km/h
10.9mph 17.5km/h
Average humidity
73%
75%
77%
Average rainfall
1.61" 41mm
1.61" 41mm
1.61" 41mm
Average rainfall days
12.8
12.9
11.4
Average snowfall
0" 0mm
0" 0mm
0" 0mm
Average snowfall days
0
0
0
Average sea temperature
39°F 3.9°C
46°F 7.8°C
59°F 15°C
Average daylight
16h 0min
15h 4min
14h 1min
Average sunshine
10h 2min
10h 2min
9h 2min
Average sunshine days
16.4
17.1
18
Average UV index
4
5
4
Average cloud cover
38%
33%
34%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in July
Grand Portage, MN

Average temperature in July - Grand Portage, MN
  • Average high temperature in July: 70°F

The warmest months (with the highest average high temperature) are July and August (70°F).
The month with the lowest average high temperature is January (16.2°F).

  • Average low temperature in July: 53.6°F

The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).

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Average pressure in July
Grand Portage, MN

Average pressure in July - Grand Portage, MN
  • Average pressure in July: 29.91"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

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Average wind speed in July
Grand Portage, MN

Average wind speed in July - Grand Portage, MN
  • Average wind speed in July: 6.3mph

The windiest month (with the highest average wind speed) is December (9.2mph).
The calmest month (with the lowest average wind speed) is June (6.2mph).

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Average humidity in July
Grand Portage, MN

Average humidity in July - Grand Portage, MN
  • Average humidity in July: 75%

The months with the highest relative humidity are January and February (90%).
The month with the lowest relative humidity is May (70%).

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Average rainfall in July
Grand Portage, MN

Average rainfall in July - Grand Portage, MN
  • Average rainfall in July: 1.61"

The wettest months (with the highest rainfall) are May and October (1.77").
The driest months (with the least rainfall) are January and February (1.06").

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Average rainfall days in July
Grand Portage, MN

Average rainfall days in July - Grand Portage, MN
  • Average rainfall days in July: 12.9 days

The month with the highest number of rainy days is July (12.9 days).
The month with the least rainy days is February (4.2 days).

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Average snowfall in July
Grand Portage, MN

Average snowfall in July - Grand Portage, MN
  • Average snowfall in July: 0"

The month with the highest snowfall is January (7.76").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in July
Grand Portage, MN

Average snowfall days in July - Grand Portage, MN
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (21.6 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
Grand Portage, MN

Average sea temperature in July - Grand Portage, MN
  • Average sea temperature in July: 46°F

The best month for swimming (with the highest average sea temperature) is August (59°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
Grand Portage, MN

Average daylight in July / Average sunshine in July - Grand Portage, MN
  • Average daylight in July: 15h and 4min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in July: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in July
Grand Portage, MN

Average sunshine days in July - Grand Portage, MN
  • Average sunshine days in July: 17.1 days

The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is March (9.8 days).

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Average UV index in July
Grand Portage, MN

Average UV index in July - Grand Portage, MN
  • Average UV index in July: 5

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in July
Grand Portage, MN

Average cloud cover in July - Grand Portage, MN
  • Average cloud cover in July: 33

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is July (Cloud cover 33).

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Average visibility in July
Grand Portage, MN

Average visibility in July - Grand Portage, MN
  • Average visibility in July: 6mi

The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April and December (5mi).

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Grand Portage, Minnesota, USA

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