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South Milwaukee, WI Weather & Growing Conditions

Overnight
62°F
Showers And Thunderstorms
A chance of rain showers before 1am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 62. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.

7-day forecast

WhenTempForecastWindPrecip
Overnight 62°F Showers And Thunderstorms 15 mph E 94%
Saturday 68°F Showers And Thunderstorms 10 to 15 mph SE 96%
Saturday Night 60°F Showers And Thunderstorms 5 to 15 mph E 80%
Sunday 65°F Chance Rain Showers 15 to 20 mph NE 37%
Sunday Night 54°F Mostly Cloudy 15 to 20 mph NE 12%
Monday 64°F Slight Chance Rain Showers 15 to 20 mph NE 18%
Monday Night 52°F Slight Chance Rain Showers then Mostly Cloudy 15 to 20 mph E 18%
Tuesday 62°F Slight Chance Rain Showers 15 to 20 mph NE 17%
Tuesday Night 53°F Mostly Cloudy 10 to 15 mph NE 14%
Wednesday 63°F Partly Sunny 10 to 15 mph NE 13%
Wednesday Night 54°F Mostly Cloudy 5 to 10 mph NE 7%
Thursday 65°F Partly Sunny 10 mph NE 3%
Thursday Night 54°F Mostly Cloudy 5 to 10 mph N 3%
Friday 67°F Mostly Sunny 5 to 10 mph NE 4%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for South Milwaukee, WI

Last spring frost
Apr 22
First fall frost
Oct 26
Growing season
184 days
Hardiness zone
6a

Explore more for South Milwaukee, WI: full frost dates · planting calendar · Wisconsin frost dates

Climate data from the nearest NOAA station, South Milwaukee Wwtp, Wi (0.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.