Mountain Iron, MN Weather & Growing Conditions
Tonight
47°F
Light Rain
Rain. Cloudy, with a low around 47. North wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Light Rain | 10 mph N | 88% |
| Wednesday | 48°F | Rain | 10 to 15 mph N | 88% |
| Wednesday Night | 36°F | Light Rain | 15 mph N | 89% |
| Thursday | 40°F | Mostly Cloudy | 10 to 15 mph N | 7% |
| Thursday Night | 24°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 40°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 24°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 46°F | Mostly Sunny | 5 to 10 mph SW | 2% |
| Saturday Night | 32°F | Partly Cloudy | 5 mph W | 14% |
| Sunday | 49°F | Mostly Sunny | 5 to 10 mph W | 11% |
| Sunday Night | 31°F | Partly Cloudy | 5 mph SW | 2% |
| Monday | 51°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 32°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 47°F | Mostly Sunny | 5 to 10 mph W | 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 (8.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.