South Milwaukee, WI Weather & Growing Conditions
Overnight
62°F
Showers And Thunderstorms
A chance of rain showers before 1am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 62. East wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Showers And Thunderstorms | 15 mph E | 94% |
| Saturday | 68°F | Showers And Thunderstorms | 10 to 15 mph SE | 96% |
| Saturday Night | 60°F | Showers And Thunderstorms | 5 to 15 mph E | 80% |
| Sunday | 65°F | Chance Rain Showers | 15 to 20 mph NE | 37% |
| Sunday Night | 54°F | Mostly Cloudy | 15 to 20 mph NE | 12% |
| 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% |
| Friday | 67°F | Mostly Sunny | 5 to 10 mph NE | 4% |
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.