May 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 May

The last month of the spring, May, is a fresh month in Mackinac Island, Michigan, with an average temperature fluctuating between 55°F (12.8°C) and 41.4°F (5.2°C).

Temperature

In Mackinac Island, the average high-temperature in May rises from a cold 42.3°F (5.7°C) in April to a cool 55°F (12.8°C). In May, the average low-temperature is 41.4°F (5.2°C).

Humidity

The least humid month is May, with an average relative humidity of 75%.

Rainfall

In Mackinac Island, Michigan, in May, during 13.3 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. Throughout the year, there are 131 rainfall days, and 21.22" (539mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.8 snowfall days, Mackinac Island aggregates 0.12" (3mm) of snow. In Mackinac Island, during the entire year, snow falls for 93.6 days and aggregates up to 27.91" (709mm) of snow.

Ocean temperature

In May, the average ocean temperature is 37.4°F (3°C).
Note: For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

Daylight

The average length of the day in May in Mackinac Island is 14h and 58min.
On the first day of May in Mackinac Island, sunrise is at 6:25 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 9:20 pm EDT.

Sunshine

In May, the average sunshine in Mackinac Island is 8.9h.

UV index

In Mackinac Island, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in May in Mackinac Island?

In May, in Mackinac Island, the average high-temperature is 55°F (12.8°C), and the average low-temperature is 41.4°F (5.2°C).

What is the least humid month in Mackinac Island?

May is the least humid month, with an average relative humidity of 75%.

What is the average humidity in May in Mackinac Island?

In Mackinac Island, the average relative humidity in May is 75%.

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

In Mackinac Island, in May, during 13.3 rainfall days, 1.69" (43mm) of precipitation is typically accumulated.

What is the last month it snows in Mackinac Island?

May is the last month it regularly snows in Mackinac Island, Michigan. During 0.8 snowfall days, in May, Mackinac Island aggregates 0.12" (3mm) of snow.

What is the ocean temperature in May in Mackinac Island?

In Mackinac Island, the average seawater temperature in May is 37.4°F (3°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Mackinac Island have in May?

In Mackinac Island, Michigan, the average day length in May is 14h and 58min.

What time are sunrise and sunset in May in Mackinac Island?

In May, on the first day of the month, sunrise is at 6:25 am and sunset at 8:45 pm. On the last day of the month, in Mackinac Island, sunrise is at 5:52 am and sunset at 9:20 pm EDT.

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

In May, the average sunshine duration is 8.9h.

What is the UV index intensity in May in Mackinac Island?

In Mackinac Island, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Mackinac Island, MI

Average temperature in May - Mackinac Island, MI
  • Average high temperature in May: 55°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 May: 41.4°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 May
Mackinac Island, MI

Average pressure in May - Mackinac Island, MI
  • Average pressure in May: 29.98"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 May
Mackinac Island, MI

Average wind speed in May - Mackinac Island, MI
  • Average wind speed in May: 8.5mph

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 May
Mackinac Island, MI

Average humidity in May - Mackinac Island, MI
  • Average humidity in May: 75%

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 May
Mackinac Island, MI

Average rainfall in May - Mackinac Island, MI
  • Average rainfall in May: 1.69"

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 May
Mackinac Island, MI

Average rainfall days in May - Mackinac Island, MI
  • Average rainfall days in May: 13.3 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 May
Mackinac Island, MI

Average snowfall in May - Mackinac Island, MI
  • Average snowfall in May: 0.12"

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 May
Mackinac Island, MI

Average snowfall days in May - Mackinac Island, MI
  • Average snowfall days in May: 0.8 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 May
Mackinac Island, MI

Average sea temperature in May - Mackinac Island, MI
  • Average sea temperature in May: 37°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 May /
Average sunshine in May
Mackinac Island, MI

Average daylight in May / Average sunshine in May - Mackinac Island, MI
  • Average daylight in May: 14h and 58min

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 May: 8h 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 May
Mackinac Island, MI

Average sunshine days in May - Mackinac Island, MI
  • Average sunshine days in May: 15.7 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 May
Mackinac Island, MI

Average UV index in May - Mackinac Island, MI
  • Average UV index in May: 4

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 May
Mackinac Island, MI

Average cloud cover in May - Mackinac Island, MI
  • Average cloud cover in May: 41

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 May
Mackinac Island, MI

Average visibility in May - Mackinac Island, MI
  • Average visibility in May: 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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