May weather forecastMackinac Island, MI
May
Weather in May
May brings a harmonious blend of moderate temperatures and rainfall to Mackinac Island. Warming trends continue and the island is transformed by abundant flora. The rains, average of 1.69" (43mm), work in concert with the sun to nurture the sprouting greenery. Lengthening daylight hours reach their year-long increments, breathing life into the spring. The weather becomes agreeable and opens the island for outdoor activities.Temperature
The shift from April to May is marked by an increase in the average high-temperature, moving from an icy 42.3°F (5.7°C) to a cool 55°F (12.8°C). The month of May records an average low-temperature of 41.4°F (5.2°C) in Mackinac Island, Michigan.Humidity
The least humid month in Mackinac Island 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. In Mackinac Island, during the entire year, the rain falls for 131 days and collects up to 21.22" (539mm) of precipitation.Snowfall
Months with snowfall in Mackinac Island are January through May, October through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Mackinac Island aggregates 0.12" (3mm) of snow. In Mackinac Island, Michigan, 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: In the scenario of swimming, this is assessed as life-threatening and highly risky. The chilling water causes severe discomfort and induces instant hyperventilation. A specialized swimsuit is necessary to counter thermal damage.
Daylight
In Mackinac Island, Michigan, the average length of the day in May is 14h and 58min.On the first day of May, sunrise is at 6:24 am and sunset at 8:46 pm. On the last day of the month, sunrise is at 5:51 am and sunset at 9:20 pm EDT.
Sunshine
In May, the average sunshine is 8.9h.UV index
In May, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: In May, the UV index of 4 transforms into the following advice:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
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).
Average daylight in May /
Average sunshine in May
Mackinac Island, MI
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- 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).
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).
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).
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).
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).
