Mackinaw City, MI Weather & Growing Conditions
Today
65°F
Partly Sunny
Partly sunny, with a high near 65. East wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 65°F | Partly Sunny | 5 to 10 mph E | 11% |
| Tonight | 48°F | Slight Chance Rain Showers | 5 to 10 mph E | 20% |
| Sunday | 67°F | Mostly Sunny | 5 to 10 mph NE | 13% |
| Sunday Night | 45°F | Partly Cloudy | 10 mph NE | 0% |
| Monday | 59°F | Partly Sunny | 10 mph E | 0% |
| Monday Night | 44°F | Partly Cloudy | 5 to 10 mph E | 0% |
| Tuesday | 62°F | Sunny | 10 to 15 mph E | 0% |
| Tuesday Night | 47°F | Mostly Clear | 5 to 15 mph E | 0% |
| Wednesday | 64°F | Sunny | 10 to 15 mph E | 7% |
| Wednesday Night | 47°F | Partly Cloudy | 5 to 15 mph E | 7% |
| Thursday | 65°F | Mostly Sunny | 5 to 10 mph E | 5% |
| Thursday Night | 47°F | Partly Cloudy | 5 to 10 mph E | 5% |
| Friday | 69°F | Mostly Sunny | 5 mph NE | 1% |
| 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 Mackinaw City, MI
Last spring frost
May 7
First fall frost
Oct 23
Growing season
167 days
Hardiness zone
5b
Explore more for Mackinaw City, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, St Ignace Mackinac Br, Mi (7.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.