Cool
Average highs are around 17°C, so pack for cooler days.
May verdict
Mackinac Island, United States in May
Weather score34Poor
Poor for holiday weather
Average highs are around 17°C, so pack for cooler days. Sunshine averages 8.3h per day, so bright days are a strong part of the month. Rainfall averages 69mm, which is relatively low for holiday planning.
May weather
Monthly averages
Temp
17°C
Rain
69mm
Sun
8.3h
Sea
5°C
Weather score
34
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 69mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.3h per day, so bright days are a strong part of the month.
Cool sea
Sea temperatures average 5°C, so the water can feel cool.
Map
Weather map
Compare Mackinac Island, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May17°C average high
May sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
May69mm average rain
May sits near Mackinac Island's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May8.3 hours average sun
May is brighter than Mackinac Island's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
May5°C average sea
May is below Mackinac Island's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJuly to September
Sea temperatures are usually near 17°C in this stretch, so swimming comfort is at its strongest.
Weather score
May34 weather score
May sits close to Mackinac Island's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
Hotels near Mackinac Island, United States
Marriott
City Express by Marriott Petoskey Harbor SpringsPetoskey, Michigan, USA
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Courtyard Traverse CityTraverse City, Michigan, USA