Iron Mountain, MI Weather & Growing Conditions
Today
78°F
Mostly Cloudy then Chance Showers And Thunderstorms
A slight chance of rain showers between noon and 1pm, then a chance of showers and thunderstorms between 1pm and 3pm, then a slight chance of showers and thunderstorms. Mostly cloudy. High near 78, with temperatures falling to around 74 in the afternoon. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 78°F | Mostly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph W | 27% |
| Tonight | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 0 to 5 mph N | 15% |
| Wednesday | 77°F | Mostly Sunny | 0 to 5 mph NW | 3% |
| Wednesday Night | 52°F | Mostly Clear | 0 to 5 mph S | 2% |
| Thursday | 82°F | Sunny | 0 to 10 mph SW | 1% |
| Thursday Night | 58°F | Mostly Clear | 5 mph SW | 2% |
| Friday | 86°F | Sunny | 5 to 10 mph SW | 13% |
| Friday Night | 61°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 33% |
| Saturday | 83°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Saturday Night | 59°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 45% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 45% |
| Sunday Night | 56°F | Chance Showers And Thunderstorms | 0 to 5 mph NW | 35% |
| Monday | 79°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 0 to 5 mph NW | 23% |
| Monday Night | 56°F | Slight Chance Showers And Thunderstorms | 0 to 5 mph N | 23% |
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 Aug 4, 2026.