Iron River, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Iron River, a community in Bayfield County, Wisconsin.
Tonight
51°F
Rain
Rain. Cloudy, with a low around 51. Northeast wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Iron River
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Rain | 5 to 10 mph NE | 87% |
| Wednesday | 54°F | Rain | 5 mph NE | 80% |
| Wednesday Night | 41°F | Light Rain | 5 to 10 mph N | 88% |
| Thursday | 44°F | Light Rain | 10 to 15 mph N | 75% |
| Thursday Night | 31°F | Mostly Cloudy | 5 to 10 mph NE | 4% |
| Friday | 42°F | Partly Sunny | 0 to 5 mph NE | 2% |
| Friday Night | 26°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 49°F | Mostly Sunny | 5 to 10 mph SW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 5 mph SW | 13% |
| Sunday | 52°F | Mostly Sunny | 5 to 10 mph W | 12% |
| Sunday Night | 34°F | Partly Cloudy | 5 mph SW | 4% |
| Monday | 54°F | Partly Sunny | 10 to 15 mph SW | 2% |
| Monday Night | 36°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 50°F | Mostly Sunny | 5 to 10 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Iron River (46.579, -91.400). Updated through the day.
Growing snapshot for Iron River
Last spring frost
May 24
First fall frost
Sep 26
Growing season
124 days
Hardiness zone
4a
More local growing data for Iron River: nearby ZIP 54847 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Brule Rs, Wi (9.6 mi from Iron River). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.