Mackinac Island, MI Weather & Growing Conditions
Today
79°F
Sunny
Sunny. High near 79, with temperatures falling to around 77 in the afternoon. Southwest wind 10 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Sunny | 10 to 15 mph SW | 3% |
| Tonight | 59°F | Showers And Thunderstorms Likely | 5 to 15 mph NW | 72% |
| Wednesday | 76°F | Showers And Thunderstorms Likely then Partly Sunny | 0 to 5 mph NW | 56% |
| Wednesday Night | 56°F | Mostly Cloudy | 0 to 5 mph N | 7% |
| Thursday | 77°F | Mostly Sunny | 0 to 5 mph SE | 7% |
| Thursday Night | 61°F | Mostly Clear | 5 mph S | 3% |
| Friday | 80°F | Sunny | 5 to 10 mph SW | 0% |
| Friday Night | 64°F | Mostly Clear then Slight Chance Rain Showers | 5 to 10 mph SW | 15% |
| Saturday | 79°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 18% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 37% |
| Sunday | 78°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 43% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 39% |
| Monday | 77°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 16% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 28% |
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 Aug 4, 2026.