Ironton, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ironton, a village in Sauk County, Wisconsin.
This Afternoon
67°F
Rain Showers
Rain showers. Cloudy. High near 67, with temperatures falling to around 61 in the afternoon. East wind around 10 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Ironton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 67°F | Rain Showers | 10 mph E | 78% |
| Tonight | 55°F | Showers And Thunderstorms | 10 to 15 mph E | 87% |
| Saturday | 71°F | Showers And Thunderstorms Likely | 5 to 10 mph E | 74% |
| Saturday Night | 53°F | Showers And Thunderstorms | 10 mph NE | 77% |
| Sunday | 68°F | Chance Rain Showers | 10 to 15 mph NE | 30% |
| Sunday Night | 48°F | Mostly Cloudy | 10 to 15 mph NE | 6% |
| Monday | 63°F | Chance Rain Showers | 10 to 15 mph NE | 25% |
| Monday Night | 44°F | Chance Rain Showers | 5 to 10 mph NE | 27% |
| Tuesday | 62°F | Chance Rain Showers then Partly Sunny | 5 to 10 mph NE | 27% |
| Tuesday Night | 43°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Wednesday | 66°F | Mostly Sunny | 0 to 5 mph NE | 3% |
| Wednesday Night | 46°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 69°F | Mostly Sunny | 0 to 5 mph NE | 7% |
| Thursday Night | 48°F | Partly Cloudy | 0 mph | 6% |
Forecast source: National Weather Service (api.weather.gov) for Ironton (43.544, -90.145). Updated through the day.
Growing snapshot for Ironton
Last spring frost
May 2
First fall frost
Oct 7
Growing season
156 days
Hardiness zone
5a
More local growing data for Ironton: nearby ZIP 53941 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Baraboo
Bluffview
La Valle
Lake Delton
Lime Ridge
Loganville
Merrimac
North Freedom
Plain
Prairie du Sac
Reedsburg
Rock Springs
Sauk City
Spring Green
West Baraboo
Climate data from the nearest NOAA station, Reedsburg, Wi (7.8 mi from Ironton). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.