Mountain Iron, MN Weather & Growing Conditions
This Afternoon
49°F
Light Rain
Rain and patchy fog. Cloudy, with a high near 49. North wind around 10 mph, with gusts as high as 25 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 | 49°F | Light Rain | 10 mph N | 89% |
| Tonight | 31°F | Light Rain then Patchy Fog | 10 to 15 mph N | 78% |
| Thursday | 39°F | Mostly Cloudy | 5 to 15 mph N | 3% |
| Thursday Night | 21°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Friday | 41°F | Sunny | 0 mph | 0% |
| Friday Night | 21°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Saturday | 46°F | Mostly Sunny | 5 mph SW | 0% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 3% |
| Sunday | 49°F | Sunny | 5 mph W | 2% |
| Sunday Night | 31°F | Partly Cloudy | 0 to 5 mph SW | 0% |
| Monday | 54°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 31°F | Mostly Clear | 5 mph W | 2% |
| Tuesday | 49°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Tuesday Night | 28°F | Partly Cloudy | 0 mph | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Mountain Iron, MN
Last spring frost
May 12
First fall frost
Oct 1
Growing season
141 days
Hardiness zone
3b
Explore more for Mountain Iron, MN: full frost dates · planting calendar · Minnesota frost dates
Climate data from the nearest NOAA station, Eveleth Wwtp, Mn (15.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.