Mukwonago, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mukwonago, a village in Waukesha County, Wisconsin.
Today
69°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 1pm, then showers and thunderstorms. Cloudy, with a high near 69. Southeast wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
7-day forecast for Mukwonago
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph SE | 78% |
| Tonight | 60°F | Showers And Thunderstorms | 5 to 10 mph NE | 86% |
| Sunday | 64°F | Rain Showers Likely | 10 to 15 mph NE | 61% |
| Sunday Night | 52°F | Mostly Cloudy | 10 to 15 mph NE | 3% |
| Monday | 61°F | Cloudy | 10 to 15 mph NE | 10% |
| Monday Night | 49°F | Mostly Cloudy | 5 to 15 mph NE | 7% |
| Tuesday | 60°F | Partly Sunny | 10 to 15 mph NE | 8% |
| Tuesday Night | 48°F | Partly Cloudy | 5 to 10 mph NE | 4% |
| Wednesday | 62°F | Mostly Sunny | 5 to 10 mph NE | 5% |
| Wednesday Night | 50°F | Partly Cloudy | 0 to 10 mph NE | 2% |
| Thursday | 65°F | Mostly Sunny | 0 to 10 mph NE | 3% |
| Thursday Night | 50°F | Mostly Cloudy | 0 to 5 mph NE | 3% |
| Friday | 68°F | Mostly Sunny | 0 to 10 mph NE | 3% |
| Friday Night | 50°F | Partly Cloudy | 0 to 5 mph NE | 2% |
Forecast source: National Weather Service (api.weather.gov) for Mukwonago (42.853, -88.321). Updated through the day.
Growing snapshot for Mukwonago
Last spring frost
May 1
First fall frost
Oct 13
Growing season
162 days
Hardiness zone
5b
More local growing data for Mukwonago: nearby ZIP 53149 weather · frost dates · planting calendar · Wisconsin frost dates
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Climate data from the nearest NOAA station, Waukesha Wwtp, Wi (10.2 mi from Mukwonago). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.