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Iron River, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Iron River, a community in Bayfield County, Wisconsin.

This Afternoon
63°F
Mostly Cloudy
Mostly cloudy, with a high near 63. Northeast wind around 5 mph.

7-day forecast for Iron River

WhenTempForecastWindPrecip
This Afternoon 63°F Mostly Cloudy 5 mph NE 5%
Tonight 50°F Mostly Cloudy then Slight Chance Rain Showers 0 to 5 mph NE 18%
Sunday 62°F Mostly Cloudy 5 to 15 mph NE 8%
Sunday Night 42°F Mostly Cloudy 5 to 10 mph E 5%
Monday 60°F Partly Sunny 5 to 10 mph E 5%
Monday Night 36°F Partly Cloudy then Patchy Frost 5 to 10 mph E 0%
Tuesday 63°F Patchy Frost then Sunny 5 to 10 mph E 0%
Tuesday Night 40°F Mostly Clear 0 to 10 mph E 0%
Wednesday 67°F Sunny 0 to 5 mph E 0%
Wednesday Night 44°F Mostly Clear 0 to 5 mph SE 1%
Thursday 69°F Mostly Sunny then Slight Chance Rain Showers 0 to 5 mph SE 15%
Thursday Night 48°F Slight Chance Rain Showers then Mostly Cloudy 0 to 5 mph SE 15%
Friday 72°F Partly Sunny 0 to 5 mph SE 4%
Friday Night 50°F Partly Cloudy 0 to 5 mph SE 4%

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

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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 Sep 19, 2026.