Mackinac Island, MI Weather & Growing Conditions
This Afternoon
67°F
Showers And Thunderstorms
A chance of rain showers before 4pm, then showers and thunderstorms. Mostly cloudy. High near 67, with temperatures falling to around 58 in the afternoon. South 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 | 67°F | Showers And Thunderstorms | 10 mph S | 87% |
| Tonight | 47°F | Showers And Thunderstorms | 10 to 15 mph SW | 95% |
| Thursday | 53°F | Rain Showers | 10 to 15 mph SW | 91% |
| Thursday Night | 34°F | Rain Showers then Rain And Snow Showers Likely | 20 to 25 mph N | 92% |
| Friday | 44°F | Rain And Snow Showers Likely | 15 to 20 mph N | 68% |
| Friday Night | 32°F | Chance Rain And Snow Showers then Mostly Cloudy | 10 to 15 mph N | 32% |
| Saturday | 46°F | Sunny | 5 to 10 mph NW | 0% |
| Saturday Night | 36°F | Mostly Clear | 10 to 15 mph W | 1% |
| Sunday | 51°F | Mostly Sunny then Slight Chance Rain Showers | 15 mph W | 16% |
| Sunday Night | 38°F | Slight Chance Rain Showers then Partly Cloudy | 10 to 15 mph NW | 16% |
| Monday | 52°F | Mostly Sunny | 10 to 15 mph W | 3% |
| Monday Night | 41°F | Slight Chance Rain Showers | 15 mph W | 15% |
| Tuesday | 51°F | Mostly Sunny | 10 to 15 mph NW | 5% |
| Tuesday Night | 37°F | Partly Cloudy | 10 to 15 mph NW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mackinac Island, MI
Last spring frost
May 16
First fall frost
Oct 13
Growing season
149 days
Hardiness zone
5b
Explore more for Mackinac Island, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, St Ignace, Mi (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.