Mackinac Island, MI Weather & Growing Conditions
Today
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 73 in the afternoon. Southwest wind 10 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 75°F | Sunny | 10 to 15 mph SW | 1% |
| Tonight | 60°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 to 15 mph NW | 72% |
| Wednesday | 70°F | Showers And Thunderstorms Likely then Mostly Cloudy | 5 mph NW | 63% |
| Wednesday Night | 57°F | Mostly Cloudy | 0 to 5 mph N | 8% |
| Thursday | 72°F | Mostly Sunny | 5 to 10 mph SE | 8% |
| Thursday Night | 61°F | Mostly Clear | 5 to 10 mph S | 4% |
| Friday | 75°F | Sunny | 10 to 15 mph SW | 0% |
| Friday Night | 64°F | Mostly Clear | 10 mph SW | 14% |
| Saturday | 78°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 15 mph SW | 17% |
| Saturday Night | 62°F | Chance Showers And Thunderstorms | 5 to 15 mph W | 36% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 10 to 15 mph W | 44% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 38% |
| Monday | 75°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 16% |
| Monday Night | 58°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 27% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mackinac Island, MI
Last spring frost
May 31
First fall frost
Sep 25
Growing season
116 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, Pickford 3Ne, Mi (13.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.