Ashippun, WI Weather & Growing Conditions
Tonight
59°F
Showers And Thunderstorms
Rain showers likely before 10pm, 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 100%. 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 | 100% |
| Saturday | 71°F | Showers And Thunderstorms | 10 to 15 mph SE | 96% |
| Saturday Night | 58°F | Showers And Thunderstorms Likely | 10 mph NE | 73% |
| Sunday | 67°F | Chance Rain Showers | 10 to 15 mph NE | 36% |
| Sunday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 17% |
| Monday | 63°F | Mostly Cloudy | 10 to 15 mph NE | 14% |
| Monday Night | 48°F | Mostly Cloudy | 5 to 10 mph NE | 14% |
| Tuesday | 62°F | Partly Sunny | 5 to 15 mph NE | 14% |
| Tuesday Night | 47°F | Partly Cloudy | 5 to 10 mph NE | 8% |
| Wednesday | 65°F | Mostly Sunny | 5 to 10 mph NE | 8% |
| Wednesday Night | 48°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Thursday | 68°F | Mostly Sunny | 0 to 5 mph NE | 2% |
| Thursday Night | 49°F | Partly Cloudy | 0 to 5 mph NE | 4% |
| Friday | 70°F | Mostly Sunny | 0 to 5 mph NE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Ashippun, WI
Last spring frost
Apr 30
First fall frost
Oct 12
Growing season
164 days
Hardiness zone
5a
Explore more for Ashippun, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Oconomowoc Wwtp, Wi (7.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.