St. Ignace, MI Weather & Growing Conditions
Tonight
56°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 56, with temperatures rising to around 58 overnight. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 56°F | Chance Rain Showers | 5 mph S | 40% |
| Wednesday | 65°F | Rain Showers | 5 to 10 mph SE | 81% |
| Wednesday Night | 47°F | Rain Showers | 5 to 10 mph S | 83% |
| Thursday | 54°F | Rain Showers | 5 to 10 mph SW | 98% |
| Thursday Night | 32°F | Rain Showers then Chance Rain And Snow Showers | 5 to 10 mph N | 98% |
| Friday | 45°F | Chance Rain And Snow Showers | 10 mph N | 35% |
| Friday Night | 31°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph N | 30% |
| Saturday | 48°F | Mostly Sunny | 5 mph NW | 5% |
| Saturday Night | 34°F | Partly Cloudy | 5 mph W | 9% |
| Sunday | 50°F | Partly Sunny then Slight Chance Rain Showers | 5 to 10 mph W | 23% |
| Sunday Night | 36°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 23% |
| Monday | 52°F | Partly Sunny | 10 to 15 mph W | 7% |
| Monday Night | 38°F | Mostly Cloudy | 10 mph W | 6% |
| Tuesday | 51°F | Partly Sunny | 10 to 15 mph NW | 13% |
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 Nov 4, 2026.