Mackinac Island, MI Weather & Growing Conditions
This Afternoon
66°F
Partly Sunny
Partly sunny, with a high near 66. East wind 10 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Partly Sunny | 10 to 15 mph E | 10% |
| Tonight | 48°F | Slight Chance Rain Showers | 5 to 15 mph E | 21% |
| Sunday | 68°F | Mostly Sunny | 5 to 10 mph NE | 14% |
| Sunday Night | 45°F | Partly Cloudy | 10 to 15 mph NE | 0% |
| Monday | 61°F | Partly Sunny | 10 to 15 mph E | 0% |
| Monday Night | 45°F | Partly Cloudy | 5 to 10 mph E | 0% |
| Tuesday | 60°F | Mostly Sunny | 10 to 15 mph E | 0% |
| Tuesday Night | 48°F | Mostly Clear | 10 to 15 mph E | 1% |
| Wednesday | 65°F | Sunny | 10 to 15 mph E | 7% |
| Wednesday Night | 48°F | Partly Cloudy | 5 to 15 mph E | 7% |
| Thursday | 66°F | Mostly Sunny | 5 to 10 mph E | 6% |
| Thursday Night | 48°F | Partly Cloudy | 5 to 10 mph E | 5% |
| Friday | 69°F | Mostly Sunny | 5 mph E | 2% |
| Friday Night | 49°F | Mostly Clear | 5 mph E | 1% |
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 Sep 19, 2026.