West Allis, WI Weather & Growing Conditions
This Afternoon
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Cloudy, with a high near 66. East wind around 5 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Chance Showers And Thunderstorms | 5 mph E | 49% |
| Tonight | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NE | 78% |
| Sunday | 64°F | Scattered Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 51% |
| Sunday Night | 54°F | Mostly Cloudy | 10 to 15 mph NE | 3% |
| Monday | 62°F | Mostly Cloudy | 10 to 15 mph NE | 6% |
| Monday Night | 52°F | Cloudy | 10 to 15 mph NE | 13% |
| Tuesday | 61°F | Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Tuesday Night | 52°F | Mostly Cloudy | 10 mph NE | 9% |
| Wednesday | 62°F | Partly Sunny | 10 to 15 mph NE | 14% |
| Wednesday Night | 53°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Thursday | 65°F | Partly Sunny | 5 to 10 mph NE | 2% |
| Thursday Night | 54°F | Mostly Cloudy | 0 to 5 mph NE | 6% |
| Friday | 68°F | Partly Sunny | 0 to 5 mph NE | 5% |
| Friday Night | 54°F | Partly Cloudy | 0 to 5 mph NE | 3% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for West Allis, WI
Last spring frost
Apr 26
First fall frost
Oct 22
Growing season
177 days
Hardiness zone
5b
Explore more for West Allis, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, West Allis, Wi (0.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.