South Milwaukee, WI Weather & Growing Conditions
Today
68°F
Showers And Thunderstorms
Showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 2pm, then showers and thunderstorms. Cloudy, with a high near 68. Southeast wind 10 to 15 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Showers And Thunderstorms | 10 to 15 mph SE | 77% |
| Tonight | 61°F | Showers And Thunderstorms | 5 to 15 mph E | 88% |
| Sunday | 64°F | Rain Showers Likely | 15 to 20 mph NE | 60% |
| Sunday Night | 53°F | Mostly Cloudy | 15 to 20 mph NE | 4% |
| Monday | 64°F | Cloudy | 15 mph NE | 8% |
| Monday Night | 52°F | Mostly Cloudy | 15 mph NE | 5% |
| Tuesday | 63°F | Partly Sunny | 15 mph NE | 8% |
| Tuesday Night | 52°F | Partly Cloudy | 10 to 15 mph NE | 7% |
| Wednesday | 63°F | Partly Sunny | 10 to 15 mph NE | 9% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 15 mph NE | 5% |
| Thursday | 64°F | Partly Sunny | 5 to 10 mph NE | 4% |
| Thursday Night | 54°F | Mostly Cloudy | 5 to 10 mph NE | 4% |
| Friday | 67°F | Partly Sunny | 5 to 10 mph NE | 4% |
| Friday Night | 55°F | Partly Cloudy | 5 to 10 mph NE | 3% |
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.