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
64°F
Isolated Rain Showers
Isolated rain showers. Mostly cloudy. High near 64, with temperatures falling to around 55 in the afternoon. Southwest wind around 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for South Milwaukee
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Isolated Rain Showers | 15 mph SW | 23% |
| Tonight | 46°F | Cloudy | 15 mph SW | 13% |
| Thursday | 56°F | Chance Rain Showers then Chance Light Rain | 10 to 15 mph W | 52% |
| Thursday Night | 39°F | Light Rain Likely | 10 to 15 mph N | 58% |
| Friday | 50°F | Slight Chance Light Rain then Mostly Cloudy | 15 to 20 mph N | 24% |
| Friday Night | 35°F | Partly Cloudy | 10 to 15 mph N | 3% |
| Saturday | 51°F | Sunny | 5 to 10 mph NW | 0% |
| Saturday Night | 37°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Sunday | 54°F | Sunny | 10 to 15 mph W | 7% |
| Sunday Night | 38°F | Mostly Clear | 5 to 10 mph W | 2% |
| Monday | 57°F | Sunny | 5 to 15 mph SW | 0% |
| Monday Night | 43°F | Partly Cloudy | 10 mph W | 1% |
| Tuesday | 57°F | Sunny | 5 to 10 mph NW | 2% |
| Tuesday Night | 42°F | Partly Cloudy | 5 mph NW | 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 Nov 4, 2026.