South Milwaukee, WI Weather & Growing Conditions
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South wind 10 to 15 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 10 to 15 mph S | 3% |
| Tonight | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 15 mph SW | 80% |
| Wednesday | 75°F | Showers And Thunderstorms | 5 mph N | 80% |
| Wednesday Night | 63°F | Chance Showers And Thunderstorms | 5 mph W | 52% |
| Thursday | 77°F | Chance Rain Showers then Partly Sunny | 5 mph NE | 30% |
| Thursday Night | 62°F | Partly Cloudy | 0 to 5 mph S | 10% |
| Friday | 81°F | Mostly Sunny | 5 mph SW | 2% |
| Friday Night | 65°F | Mostly Clear | 5 mph S | 6% |
| Saturday | 81°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 68°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 27% |
| Sunday | 81°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 27% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 50% |
| Monday | 80°F | Chance Rain Showers | 5 to 10 mph S | 45% |
| Monday Night | 67°F | Chance Showers And Thunderstorms | 5 to 10 mph N | 44% |
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 Aug 4, 2026.