Ironton, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Ironton, a village in Sauk County, Wisconsin.

Today

60°F

Cloudy then Isolated Rain Showers

Isolated rain showers after 3pm. Cloudy. High near 60, with temperatures falling to around 52 in the afternoon. Southwest wind around 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.

7-day forecast for Ironton

When	Temp	Forecast	Wind	Precip
Today	60°F	Cloudy then Isolated Rain Showers	15 mph SW	19%
Tonight	45°F	Rain Showers Likely	10 to 15 mph SW	71%
Thursday	52°F	Rain Showers Likely then Slight Chance Light Rain	10 to 15 mph NW	55%
Thursday Night	35°F	Mostly Cloudy	10 to 15 mph N	6%
Friday	48°F	Partly Sunny	5 to 10 mph N	1%
Friday Night	28°F	Mostly Clear	0 mph	0%
Saturday	51°F	Sunny	0 to 5 mph W	0%
Saturday Night	32°F	Mostly Clear	0 to 5 mph W	3%
Sunday	57°F	Sunny	5 to 10 mph W	6%
Sunday Night	33°F	Mostly Clear	0 to 5 mph W	0%
Monday	62°F	Mostly Sunny	0 to 10 mph SW	0%
Monday Night	38°F	Mostly Clear	0 to 5 mph W	0%
Tuesday	61°F	Sunny	0 to 5 mph NW	0%
Tuesday Night	36°F	Partly Cloudy	0 mph	3%

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

More local growing data for Ironton: nearby ZIP 53941 weather · frost dates · planting calendar · Wisconsin frost dates

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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

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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 Nov 4, 2026.