Mackinac Island weather in May 2025

Expect 17°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Mackinac Island in May. Check more long-term weather averages for Mackinac Island in May before you book your next holiday to Michigan in 2025/2026.

  • 17°C maximum daytime temperature in May in Mackinac Island17
    17°C max day temperature
  • 8 hours of sunshine per day
  • 11 days with some rainfall in May in Mackinac Island11
    11 days with some rainfall
  • 4°C minimum night-time temperature in May in Mackinac Island4
    4°C min night temperature
  • 15 hours of daylight per day in May in Mackinac Island15
    15 hours of daylight per day
  • No heat & humidity in May in Mackinac Island0
    No heat & humidity
  • 69 mm monthly rainfall in May in Mackinac Island69
    69 mm of monthly rainfall
  • UV (maximum) index 6 (High) in May in Mackinac Island6
    6 (High) UV index
  • 3°C sea temperature in May in Mackinac Island3
    3°C sea temperature

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The May weather guide for Michigan (Mackinac Island) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How warm is it in Mackinac Island in May?

Daytime temperatures usually reach 17°C in Mackinac Island in May, falling to 4°C at night.

How sunny is it in Mackinac Island in May?

There are normally 8 hours of bright sunshine each day in Mackinac Island in May - that's 56% of daylight hours.

Is the sea cold around Mackinac Island in May?

The average sea temperature around Mackinac Island in May is 3°C.

Does it rain in Mackinac Island in May?

There are usually 11 days with some rain in Mackinac Island in May and the average monthly rainfall is 69mm.

Mackinac Island May sunrise & sunset times

Browse the sunrise and sunset times for Mackinac Island in May 2025. Select a month to view Mackinac Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st May 2025 05:25 19:47
Friday, 16th May 2025 05:05 20:05
Saturday, 31st May 2025 04:52 20:21

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