Ironton, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ironton, a village in Sauk County, Wisconsin.
Today
79°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 79. Southwest wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Ironton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Mostly Cloudy then Chance Showers And Thunderstorms | 10 mph SW | 27% |
| Tonight | 60°F | Chance Showers And Thunderstorms | 0 to 10 mph NW | 53% |
| Wednesday | 78°F | Areas Of Fog then Partly Sunny | 0 to 5 mph NW | 22% |
| Wednesday Night | 53°F | Partly Cloudy | 0 to 5 mph W | 2% |
| Thursday | 80°F | Sunny | 0 to 5 mph S | 1% |
| Thursday Night | 57°F | Mostly Clear | 0 mph | 1% |
| Friday | 83°F | Sunny | 0 to 10 mph SW | 3% |
| Friday Night | 63°F | Mostly Clear | 5 to 10 mph SW | 10% |
| Saturday | 85°F | Mostly Sunny | 5 to 10 mph SW | 10% |
| Saturday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 5 to 10 mph SW | 31% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 31% |
| Sunday Night | 64°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 48% |
| Monday | 83°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph S | 48% |
| Monday Night | 64°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 0 to 5 mph N | 34% |
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 Aug 4, 2026.