Iron River, WI Weather & Growing Conditions
Overnight
50°F
Light Rain
Rain and patchy fog. Cloudy, with a low around 50. Northeast wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Light Rain | 5 mph NE | 83% |
| Wednesday | 56°F | Light Rain | 5 mph NE | 86% |
| Wednesday Night | 40°F | Light Rain | 5 to 15 mph N | 89% |
| Thursday | 44°F | Light Rain then Cloudy | 10 to 15 mph N | 78% |
| Thursday Night | 29°F | Mostly Cloudy | 5 to 10 mph NE | 4% |
| Friday | 43°F | Partly Sunny | 0 to 5 mph NE | 0% |
| Friday Night | 25°F | Mostly Clear | 0 to 5 mph S | 0% |
| Saturday | 46°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Saturday Night | 32°F | Partly Cloudy | 10 mph SW | 10% |
| Sunday | 50°F | Mostly Sunny | 5 to 10 mph W | 9% |
| Sunday Night | 33°F | Mostly Cloudy | 5 mph SW | 2% |
| Monday | 55°F | Mostly Sunny | 5 to 15 mph SW | 0% |
| Monday Night | 34°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 50°F | Mostly Sunny | 5 to 10 mph W | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Iron River, WI
Last spring frost
May 24
First fall frost
Sep 26
Growing season
124 days
Hardiness zone
4a
Explore more for Iron River, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Brule Rs, Wi (9.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.