Iron River, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iron River, a city in Iron County, Michigan.
Tonight
57°F
Rain Showers
A chance of rain showers before 9pm, then rain showers and patchy fog. Cloudy, with a low around 57. Southeast wind around 5 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Iron River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 57°F | Rain Showers | 5 mph SE | 95% |
| Wednesday | 63°F | Patchy Fog | 5 to 10 mph SE | 91% |
| Wednesday Night | 44°F | Rain Showers | 0 to 5 mph SW | 91% |
| Thursday | 48°F | Rain Showers | 0 to 10 mph N | 98% |
| Thursday Night | 28°F | Chance Rain Showers then Slight Chance Snow Showers | 5 to 15 mph N | 28% |
| Friday | 42°F | Partly Sunny | 5 to 10 mph N | 5% |
| Friday Night | 22°F | Partly Cloudy | 0 to 5 mph N | 2% |
| Saturday | 47°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Saturday Night | 28°F | Partly Cloudy | 0 to 5 mph W | 14% |
| Sunday | 51°F | Mostly Sunny then Slight Chance Rain Showers | 5 to 10 mph NW | 16% |
| Sunday Night | 30°F | Partly Cloudy | 5 mph W | 7% |
| Monday | 54°F | Partly Sunny | 5 to 10 mph SW | 3% |
| Monday Night | 33°F | Partly Cloudy | 5 to 10 mph W | 3% |
| Tuesday | 51°F | Mostly Sunny | 5 to 10 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Iron River (46.096, -88.637). Updated through the day.
Growing snapshot for Iron River
Last spring frost
Jun 4
First fall frost
Sep 10
Growing season
95 days
Hardiness zone
4a
More local growing data for Iron River: nearby ZIP 49915 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Stambaugh 2Sse, Mi (0.6 mi from Iron River). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.