August weather forecast
Mackinac Island, MI

A tranquil neighborhood with homes and a church in a scenic natural park in Mackinac Island, Michigan
A tranquil neighborhood with homes and a church in a scenic natural park in Mackinac Island, Michigan

Weather in August

August, the last month of the summer in Mackinac Island, is also an agreeable month, with an average temperature varying between 71.1°F (21.7°C) and 58.6°F (14.8°C).

Temperature

In Mackinac Island, the average high-temperature in August is essentially the same as in July - a still pleasant 71.1°F (21.7°C). In August, in Mackinac Island, the average low-temperature is 58.6°F (14.8°C).

Humidity

In Mackinac Island, the average relative humidity in August is 79%.

Rainfall

In Mackinac Island, during August, the rain falls for 13.8 days and regularly aggregates up to 1.65" (42mm) of precipitation. In Mackinac Island, Michigan, during the entire year, the rain falls for 131 days and collects up to 21.22" (539mm) of precipitation.

Snowfall

June through September are months without snowfall in Mackinac Island.

Ocean temperature

August is the month with the warmest seawater, with an average ocean temperature of 60.8°F (16°C).
Note: For swimming, a surface water temperature of 60.8°F (16°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

In Mackinac Island, the average length of the day in August is 14h and 5min.
On the first day of August, sunrise is at 6:21 am and sunset at 9:08 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 8:19 pm EDT.

Sunshine

In August, the average sunshine is 9.9h.

UV index

June through August, with an average maximum UV index of 5, are months with the highest UV index in Mackinac Island, Michigan. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In August, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in August in Mackinac Island?

In Mackinac Island, in August, the average high-temperature is 71.1°F (21.7°C), and the average low-temperature is 58.6°F (14.8°C).

What is the average humidity in August in Mackinac Island?

In Mackinac Island, Michigan, the average relative humidity in August is 79%.

How many days does it rain in August in Mackinac Island?

In August, the rain falls for 13.8 days. Throughout August, 1.65" (42mm) of precipitation is accumulated.

When it does not snow in Mackinac Island?

June through September are months without snowfall in Mackinac Island.

What is the month with the warmest ocean in Mackinac Island?

August is the month with the warmest seawater in Mackinac Island, Michigan, with an average ocean temperature of 60.8°F (16°C).

What is the ocean temperature in August in Mackinac Island?

In Mackinac Island, Michigan, 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).

What is the average length of the day in August in Mackinac Island?

In Mackinac Island, Michigan, the average day length in August is 14h and 5min.

When are sunrise and sunset in August in Mackinac Island?

On the first day of August in Mackinac Island, sunrise is at 6:21 am and sunset at 9:08 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 8:19 pm EDT.

How many hours of sunshine does Mackinac Island have in August?

In Mackinac Island, the average sunshine duration in August is 9.9h.

What are the months with the highest UV index in Mackinac Island?

June through August, with an average maximum UV index of 5, are months with the highest UV index in Mackinac Island, Michigan.

What is the UV index reading in August in Mackinac Island?

The average daily maximum UV index in August in Mackinac Island is 5. A UV Index reading of 3 to 5 represents a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
Mackinac Island, MI

Average temperature in August - Mackinac Island, MI
  • Average high temperature in August: 71.1°F

The warmest month (with the highest average high temperature) is July (71.4°F).
The month with the lowest average high temperature is January (23.4°F).

  • Average low temperature in August: 58.6°F

The month with the highest average low temperature is August (58.6°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).

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Average pressure in August
Mackinac Island, MI

Average pressure in August - Mackinac Island, MI
  • Average pressure in August: 29.94"Hg

The month with the highest atmospheric pressure is March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in August
Mackinac Island, MI

Average wind speed in August - Mackinac Island, MI
  • Average wind speed in August: 8.1mph

The windiest months (with the highest average wind speed) are November and December (10.9mph).
The calmest months (with the lowest average wind speed) are June and July (7.6mph).

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Average humidity in August
Mackinac Island, MI

Average humidity in August - Mackinac Island, MI
  • Average humidity in August: 79%

The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (75%).

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Average rainfall in August
Mackinac Island, MI

Average rainfall in August - Mackinac Island, MI
  • Average rainfall in August: 1.65"

The wettest month (with the highest rainfall) is October (2.72").
The driest month (with the least rainfall) is January (1.3").

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Average rainfall days in August
Mackinac Island, MI

Average rainfall days in August - Mackinac Island, MI
  • Average rainfall days in August: 13.8 days

The month with the highest number of rainy days is October (16.5 days).
The month with the least rainy days is February (5.3 days).

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Average snowfall in August
Mackinac Island, MI

Average snowfall in August - Mackinac Island, MI
  • Average snowfall in August: 0"

The month with the highest snowfall is January (5.91").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in August
Mackinac Island, MI

Average snowfall days in August - Mackinac Island, MI
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (21.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in August
Mackinac Island, MI

Average sea temperature in August - Mackinac Island, MI
  • 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 February, March and April (36°F).

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Average daylight in August /
Average sunshine in August
Mackinac Island, MI

Average daylight in August / Average sunshine in August - Mackinac Island, MI
  • Average daylight in August: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 40min).
The month with the shortest days is December (Average daylight: 8h and 44min).

  • Average sunshine in August: 9h and 54min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 1h and 54min).

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Average sunshine days in August
Mackinac Island, MI

Average sunshine days in August - Mackinac Island, MI
  • Average sunshine days in August: 15.4 days

The month with the most sunshine days is September (16.9 days).
The month with the least sunshine days is January (7.1 days).

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Average UV index in August
Mackinac Island, MI

Average UV index in August - Mackinac Island, MI
  • Average UV index in August: 5

The months with the highest UV index are June, July and August (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 August
Mackinac Island, MI

Average cloud cover in August - Mackinac Island, MI
  • Average cloud cover in August: 32

The month with the most cloud cover is January (Cloud cover 80).
The months with the least cloud cover are July and August (Cloud cover 32).

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Average visibility in August
Mackinac Island, MI

Average visibility in August - Mackinac Island, MI
  • Average visibility in August: 6mi

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

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