Mackinaw City, MI Weather & Growing Conditions
Overnight
59°F
Mostly Clear
Mostly clear, with a low around 59. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Mostly Clear | 5 mph S | 1% |
| Tuesday | 81°F | Sunny | 5 to 15 mph SW | 1% |
| Tuesday Night | 61°F | Showers And Thunderstorms | 5 to 10 mph NW | 75% |
| Wednesday | 75°F | Showers And Thunderstorms Likely | 0 to 5 mph N | 58% |
| Wednesday Night | 58°F | Partly Cloudy | 0 to 5 mph NE | 8% |
| Thursday | 77°F | Mostly Sunny | 0 to 5 mph S | 7% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph S | 4% |
| Friday | 80°F | Sunny | 5 to 10 mph SW | 1% |
| Friday Night | 66°F | Mostly Clear | 5 to 10 mph SW | 12% |
| Saturday | 79°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 17% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 35% |
| Sunday | 79°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 39% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 39% |
| Monday | 77°F | Slight Chance Rain Showers | 5 to 10 mph W | 18% |
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 Aug 4, 2026.