Waukesha, WI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Waukesha, a city in Waukesha County, Wisconsin.
Today
83°F
Mostly Sunny
Mostly sunny, with a high near 83. Southwest wind 5 to 10 mph.
7-day forecast for Waukesha
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Mostly Sunny | 5 to 10 mph SW | 5% |
| Tonight | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph W | 86% |
| Wednesday | 74°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph W | 76% |
| Wednesday Night | 60°F | Chance Showers And Thunderstorms | 0 to 5 mph NE | 45% |
| Thursday | 77°F | Slight Chance Rain Showers then Mostly Sunny | 0 to 5 mph NE | 23% |
| Thursday Night | 59°F | Mostly Clear | 0 mph | 10% |
| Friday | 81°F | Sunny | 0 to 5 mph SW | 2% |
| Friday Night | 62°F | Mostly Clear | 0 to 5 mph SW | 7% |
| Saturday | 82°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 15% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 5 mph SW | 29% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 29% |
| Sunday Night | 66°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 to 10 mph SW | 51% |
| Monday | 82°F | Chance Rain Showers | 5 mph S | 45% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 0 to 5 mph N | 44% |
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
Nearby towns & communities
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Oconomowoc
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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 Aug 4, 2026.