St. Ignace, MI Weather & Growing Conditions
This Afternoon
68°F
Showers And Thunderstorms
Showers and thunderstorms. Mostly cloudy. High near 68, with temperatures falling to around 61 in the afternoon. Southwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Showers And Thunderstorms | 5 mph SW | 94% |
| Tonight | 44°F | Showers And Thunderstorms | 5 to 10 mph S | 91% |
| Thursday | 53°F | Rain Showers | 10 to 15 mph W | 98% |
| Thursday Night | 28°F | Rain Showers | 10 to 15 mph N | 98% |
| Friday | 43°F | Rain And Snow Showers Likely | 10 to 15 mph N | 64% |
| Friday Night | 25°F | Slight Chance Rain And Snow Showers then Mostly Cloudy | 5 to 10 mph N | 24% |
| Saturday | 47°F | Mostly Sunny | 5 mph NW | 0% |
| Saturday Night | 30°F | Mostly Clear | 5 mph W | 1% |
| Sunday | 52°F | Slight Chance Rain Showers | 5 to 10 mph W | 15% |
| Sunday Night | 32°F | Slight Chance Rain Showers then Partly Cloudy | 5 to 10 mph NW | 15% |
| Monday | 53°F | Partly Sunny | 5 to 10 mph W | 2% |
| Monday Night | 36°F | Slight Chance Rain Showers | 5 to 10 mph W | 15% |
| Tuesday | 53°F | Mostly Sunny | 5 to 10 mph NW | 5% |
| Tuesday Night | 30°F | Mostly Cloudy | 5 mph NW | 5% |
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
5a
Explore more for St. Ignace, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Moran, Mi (4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.