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Waukesha, WI Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Waukesha, a village in Waukesha County, Wisconsin.

This Afternoon
66°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 1pm and 5pm, then showers and thunderstorms likely. Cloudy, with a high near 66. East wind 0 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a half and three quarters of an inch possible.

7-day forecast for Waukesha

WhenTempForecastWindPrecip
This Afternoon 66°F Chance Showers And Thunderstorms 0 to 5 mph E 55%
Tonight 61°F Showers And Thunderstorms 5 to 10 mph NE 76%
Sunday 65°F Chance Rain Showers then Mostly Cloudy 10 to 15 mph NE 34%
Sunday Night 53°F Mostly Cloudy 10 to 15 mph NE 8%
Monday 61°F Slight Chance Rain Showers 10 to 15 mph NE 21%
Monday Night 50°F Mostly Cloudy then Slight Chance Rain Showers 5 to 10 mph NE 19%
Tuesday 60°F Slight Chance Rain Showers then Mostly Cloudy 5 to 15 mph NE 19%
Tuesday Night 49°F Partly Cloudy 5 to 10 mph NE 7%
Wednesday 62°F Mostly Sunny 5 to 10 mph NE 5%
Wednesday Night 50°F Partly Cloudy 0 to 5 mph NE 2%
Thursday 64°F Mostly Sunny 0 to 10 mph NE 4%
Thursday Night 50°F Partly Cloudy 0 to 5 mph NE 4%
Friday 68°F Mostly Sunny 0 to 5 mph NE 4%
Friday Night 50°F Partly Cloudy 0 to 5 mph NE 2%

Forecast source: National Weather Service (api.weather.gov) for Waukesha (42.960, -88.249). Updated through the day.

Growing snapshot for Waukesha

Last spring frost
May 1
First fall frost
Oct 13
Growing season
162 days
Hardiness zone
5b

More local growing data for Waukesha: nearby ZIP 53189 weather · frost dates · planting calendar · Wisconsin frost dates

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Climate data from the nearest NOAA station, Waukesha Wwtp, Wi (4.8 mi from Waukesha). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.