South Milwaukee, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Milwaukee, a city in Milwaukee County, Wisconsin.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South wind 10 to 15 mph.
7-day forecast for South Milwaukee
| 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) for South Milwaukee (42.913, -87.862). Updated through the day.
Growing snapshot for South Milwaukee
Last spring frost
Apr 22
First fall frost
Oct 26
Growing season
184 days
Hardiness zone
6a
More local growing data for South Milwaukee: nearby ZIP 53172 weather · frost dates · planting calendar · Wisconsin frost dates
Nearby towns & communities
Bayside
Brown Deer
Cudahy
Fox Point
Franklin
Glendale
Greendale
Greenfield
Hales Corners
Milwaukee
Oak Creek
River Hills
Shorewood
St. Francis
Wauwatosa
West Allis
West Milwaukee
Whitefish Bay
Climate data from the nearest NOAA station, South Milwaukee Wwtp, Wi (0.9 mi from South Milwaukee). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.