Iron Mountain, MI Weather & Growing Conditions
This Afternoon
62°F
Chance Rain Showers
A chance of rain showers before 5pm. Mostly cloudy. High near 62, with temperatures falling to around 59 in the afternoon. South wind 5 to 10 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 62°F | Chance Rain Showers | 5 to 10 mph S | 33% |
| Tonight | 46°F | Rain Showers Likely | 5 mph SW | 65% |
| Thursday | 48°F | Rain Showers Likely | 10 to 15 mph NW | 68% |
| Thursday Night | 30°F | Chance Rain And Snow Showers | 10 to 15 mph N | 27% |
| Friday | 41°F | Mostly Cloudy | 10 mph N | 11% |
| Friday Night | 22°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Saturday | 48°F | Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 28°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Sunday | 54°F | Sunny | 10 to 15 mph NW | 4% |
| Sunday Night | 29°F | Partly Cloudy | 0 to 5 mph W | 1% |
| Monday | 58°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 35°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 54°F | Mostly Sunny | 5 to 10 mph NW | 1% |
| Tuesday Night | 28°F | Partly Cloudy | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Iron Mountain, MI
Last spring frost
May 25
First fall frost
Sep 24
Growing season
121 days
Hardiness zone
4b
Explore more for Iron Mountain, MI: full frost dates · planting calendar · Michigan frost dates
Climate data from the nearest NOAA station, Iron Mtn Ford Ap, Mi (8.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.