West Allis, WI Weather & Growing Conditions
Tonight
59°F
Showers And Thunderstorms
Rain showers likely before 1am, then showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy, with a low around 59. East wind 10 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between 1 and 2 inches possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Showers And Thunderstorms | 10 to 15 mph E | 93% |
| Saturday | 71°F | Showers And Thunderstorms | 5 to 15 mph SE | 94% |
| Saturday Night | 59°F | Showers And Thunderstorms Likely | 5 to 10 mph NE | 74% |
| Sunday | 66°F | Chance Rain Showers | 10 to 20 mph NE | 50% |
| Sunday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 25% |
| Monday | 63°F | Mostly Cloudy then Slight Chance Rain Showers | 15 mph NE | 15% |
| Monday Night | 51°F | Slight Chance Rain Showers | 10 to 15 mph NE | 15% |
| Tuesday | 61°F | Slight Chance Rain Showers | 10 to 15 mph NE | 16% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 10 mph NE | 13% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 13% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 10 mph N | 7% |
| Thursday | 66°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 52°F | Mostly Cloudy | 0 to 5 mph N | 4% |
| Friday | 68°F | Mostly Sunny | 5 mph N | 4% |
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 (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.