Iron Junction, MN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iron Junction, a city in St. Louis County, Minnesota.
Tonight
47°F
Light Rain
Rain. Cloudy. Low around 47, with temperatures rising to around 49 overnight. Northeast 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 for Iron Junction
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Light Rain | 10 mph NE | 88% |
| Wednesday | 50°F | Rain | 10 to 15 mph N | 87% |
| Wednesday Night | 36°F | Light Rain | 15 mph N | 86% |
| Thursday | 41°F | Mostly Cloudy | 10 to 15 mph N | 8% |
| Thursday Night | 23°F | Partly Cloudy | 0 to 5 mph NE | 0% |
| Friday | 41°F | Mostly Sunny | 0 mph | 0% |
| Friday Night | 23°F | Partly Cloudy | 0 mph | 0% |
| Saturday | 47°F | Mostly Sunny | 0 to 10 mph SW | 2% |
| Saturday Night | 30°F | Partly Cloudy | 5 mph W | 14% |
| Sunday | 50°F | Mostly Sunny | 5 to 10 mph W | 10% |
| Sunday Night | 30°F | Partly Cloudy | 0 to 5 mph SW | 1% |
| Monday | 52°F | Partly Sunny | 5 to 10 mph SW | 1% |
| Monday Night | 31°F | Partly Cloudy | 5 to 10 mph W | 0% |
| Tuesday | 47°F | Mostly Sunny | 5 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for Iron Junction (47.419, -92.609). Updated through the day.
Growing snapshot for Iron Junction
Last spring frost
Jun 5
First fall frost
Sep 8
Growing season
93 days
Hardiness zone
3b
More local growing data for Iron Junction: nearby ZIP 55751 weather · frost dates · planting calendar · Minnesota frost dates
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Climate data from the nearest NOAA station, Hibbing Chisholm Hibbing Ap, Mn (7.8 mi from Iron Junction). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.