Waukesha, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waukesha, a city in Waukesha County, Wisconsin.
This Afternoon
68°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 68. East wind around 10 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Waukesha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 68°F | Chance Rain Showers | 10 mph E | 33% |
| Tonight | 59°F | Showers And Thunderstorms | 10 mph E | 95% |
| 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 15 mph NE | 48% |
| Sunday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 26% |
| Monday | 61°F | Slight Chance Rain Showers | 10 to 15 mph NE | 15% |
| Monday Night | 50°F | Slight Chance Rain Showers | 10 mph NE | 15% |
| Tuesday | 60°F | Slight Chance Rain Showers then Partly Sunny | 10 to 15 mph NE | 15% |
| Tuesday Night | 50°F | Mostly Cloudy | 5 to 10 mph NE | 11% |
| Wednesday | 63°F | Partly Sunny | 5 to 10 mph NE | 11% |
| Wednesday Night | 50°F | Mostly Cloudy | 0 to 5 mph NE | 6% |
| Thursday | 65°F | Partly Sunny | 0 to 5 mph NE | 3% |
| Thursday Night | 51°F | Partly Cloudy | 0 to 5 mph N | 4% |
Forecast source: National Weather Service (api.weather.gov) for Waukesha (43.009, -88.245). Updated through the day.
Growing snapshot for Waukesha
Last spring frost
Apr 30
First fall frost
Oct 14
Growing season
164 days
Hardiness zone
5b
More local growing data for Waukesha: nearby ZIP 53186 weather · frost dates · planting calendar · Wisconsin frost dates
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Waukesha
Climate data from the nearest NOAA station, Brookfield Wwtp, Wi (2.5 mi from Waukesha). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.