South Milwaukee, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Milwaukee, a city in Milwaukee County, Wisconsin.
This Afternoon
69°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 69. East wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for South Milwaukee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Chance Rain Showers | 10 mph E | 26% |
| Tonight | 59°F | Showers And Thunderstorms | 10 to 15 mph E | 92% |
| Saturday | 71°F | Showers And Thunderstorms | 10 to 15 mph SE | 94% |
| Saturday Night | 59°F | Showers And Thunderstorms | 10 to 15 mph NE | 75% |
| Sunday | 67°F | Chance Rain Showers | 15 to 20 mph NE | 52% |
| Sunday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 15 to 20 mph NE | 26% |
| 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% |
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 Sep 18, 2026.