Mountain Iron, MN Weather & Growing Conditions
Overnight
47°F
Mostly Cloudy
Mostly cloudy. Low around 47, with temperatures rising to around 49 overnight. East wind around 0 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Cloudy | 0 mph | 3% |
| Saturday | 66°F | Patchy Fog then Mostly Cloudy | 0 to 5 mph E | 2% |
| Saturday Night | 48°F | Mostly Cloudy | 5 mph N | 2% |
| Sunday | 61°F | Partly Sunny | 5 mph NE | 0% |
| Sunday Night | 38°F | Mostly Cloudy | 0 to 5 mph E | 0% |
| Monday | 60°F | Mostly Sunny | 0 to 5 mph E | 0% |
| Monday Night | 36°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Tuesday | 61°F | Sunny | 0 to 5 mph SE | 0% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Wednesday | 62°F | Sunny | 0 to 10 mph SE | 0% |
| Wednesday Night | 40°F | Mostly Clear | 0 to 5 mph SE | 3% |
| Thursday | 64°F | Mostly Sunny | 0 to 5 mph S | 5% |
| Thursday Night | 44°F | Partly Cloudy | 0 to 5 mph SE | 6% |
| Friday | 67°F | Mostly Sunny | 0 to 5 mph S | 6% |
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 Sep 19, 2026.