Mackinac Island, MI Weather & Growing Conditions
This Afternoon
64°F
Mostly Sunny
Mostly sunny, with a high near 64. Southeast wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Mostly Sunny | 10 mph SE | 6% |
| Tonight | 46°F | Mostly Cloudy | 5 to 10 mph E | 8% |
| Sunday | 67°F | Mostly Sunny | 5 to 10 mph N | 8% |
| Sunday Night | 42°F | Partly Cloudy | 10 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 5 to 10 mph E | 0% |
| Monday Night | 42°F | Partly Cloudy | 5 mph E | 0% |
| Tuesday | 62°F | Mostly Sunny | 5 to 10 mph E | 0% |
| Tuesday Night | 45°F | Mostly Clear | 5 to 10 mph E | 0% |
| Wednesday | 64°F | Sunny | 10 to 15 mph E | 4% |
| Wednesday Night | 47°F | Mostly Clear | 5 to 15 mph E | 5% |
| Thursday | 65°F | Mostly Sunny | 5 to 10 mph E | 3% |
| Thursday Night | 47°F | Partly Cloudy | 5 to 10 mph E | 3% |
| Friday | 69°F | Mostly Sunny | 5 mph E | 2% |
| Friday Night | 48°F | Partly Cloudy | 0 to 5 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mackinac Island, MI
Last spring frost
Jun 1
First fall frost
Sep 21
Growing season
110 days
Hardiness zone
5a
Explore more for Mackinac Island, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Rudyard 5Se, Mi (11.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.