Harman US

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

WhenTempForecastWindPrecip
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.