Mackinac Island, MI Weather & Growing Conditions
This Afternoon
64°F
Showers And Thunderstorms
Rain showers likely before 4pm, then showers and thunderstorms. Mostly cloudy. High near 64, with temperatures falling to around 60 in the afternoon. Southeast wind around 10 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Showers And Thunderstorms | 10 mph SE | 87% |
| Tonight | 47°F | Showers And Thunderstorms | 5 to 10 mph S | 98% |
| Thursday | 53°F | Rain Showers | 10 mph SW | 94% |
| Thursday Night | 32°F | Rain Showers | 15 to 20 mph N | 94% |
| Friday | 43°F | Rain And Snow Showers Likely | 15 mph N | 66% |
| Friday Night | 28°F | Chance Rain And Snow Showers then Mostly Cloudy | 5 to 10 mph N | 29% |
| Saturday | 47°F | Sunny | 5 mph N | 0% |
| Saturday Night | 33°F | Mostly Clear | 5 to 10 mph W | 1% |
| Sunday | 52°F | Mostly Sunny then Slight Chance Rain Showers | 10 to 15 mph W | 15% |
| Sunday Night | 36°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 10 mph NW | 15% |
| Monday | 53°F | Partly Sunny | 5 to 15 mph W | 1% |
| Monday Night | 39°F | Partly Cloudy | 10 mph W | 1% |
| Tuesday | 52°F | Mostly Sunny | 10 to 15 mph NW | 5% |
| Tuesday Night | 34°F | Mostly Cloudy | 5 to 10 mph NW | 5% |
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 Nov 4, 2026.