Mackinac Island, MI Weather & Growing Conditions
This Afternoon
70°F
Rain Showers
Rain showers. Mostly cloudy. High near 70, with temperatures falling to around 61 in the afternoon. South wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Rain Showers | 10 mph S | 83% |
| Tonight | 45°F | Rain Showers | 5 to 10 mph SW | 94% |
| Thursday | 55°F | Rain Showers | 10 mph SW | 84% |
| Thursday Night | 32°F | Rain Showers then Rain And Snow Showers | 15 mph N | 92% |
| Friday | 47°F | Rain And Snow Showers | 15 mph N | 78% |
| Friday Night | 30°F | Chance Rain Showers then Mostly Cloudy | 10 mph N | 43% |
| Saturday | 48°F | Mostly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 34°F | Mostly Clear | 5 to 10 mph W | 1% |
| Sunday | 52°F | Mostly Sunny then Slight Chance Rain Showers | 10 to 15 mph W | 16% |
| Sunday Night | 37°F | Slight Chance Rain Showers | 5 to 15 mph NW | 16% |
| Monday | 55°F | Mostly Sunny | 5 to 15 mph W | 3% |
| Monday Night | 39°F | Slight Chance Rain Showers | 10 mph W | 15% |
| Tuesday | 54°F | Mostly Sunny | 10 to 15 mph NW | 4% |
| Tuesday Night | 35°F | Partly Cloudy | 5 to 10 mph NW | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mackinac Island, MI
Last spring frost
May 11
First fall frost
Oct 11
Growing season
152 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, Cheboygan, Mi (8.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.