St. Ignace, MI Weather & Growing Conditions
Today
80°F
Sunny
Sunny. High near 80, with temperatures falling to around 78 in the afternoon. Southwest wind 5 to 15 mph, with gusts as high as 30 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Sunny | 5 to 15 mph SW | 4% |
| Tonight | 58°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 72% |
| Wednesday | 77°F | Chance Rain Showers then Partly Sunny | 0 to 5 mph N | 49% |
| Wednesday Night | 55°F | Mostly Cloudy | 0 to 5 mph N | 8% |
| Thursday | 79°F | Mostly Sunny | 0 to 5 mph SE | 8% |
| Thursday Night | 61°F | Mostly Clear | 5 mph S | 3% |
| Friday | 81°F | Sunny | 5 to 10 mph SW | 0% |
| Friday Night | 64°F | Mostly Clear then Slight Chance Rain Showers | 5 to 10 mph SW | 15% |
| Saturday | 78°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 19% |
| Saturday Night | 61°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 37% |
| Sunday | 77°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 41% |
| Sunday Night | 58°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 40% |
| Monday | 76°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph W | 16% |
| Monday Night | 57°F | Chance Showers And Thunderstorms | 5 to 10 mph NW | 29% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Ignace, MI
Last spring frost
May 23
First fall frost
Sep 30
Growing season
130 days
Hardiness zone
5b
Explore more for St. Ignace, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Moran, Mi (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.