Waukesha, WI Weather & Growing Conditions
Today
63°F
Isolated Rain Showers
Isolated rain showers. Cloudy. High near 63, with temperatures falling to around 54 in the afternoon. Southwest wind 10 to 15 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 63°F | Isolated Rain Showers | 10 to 15 mph SW | 22% |
| Tonight | 45°F | Cloudy then Chance Rain Showers | 10 to 15 mph SW | 28% |
| Thursday | 55°F | Chance Rain Showers then Chance Light Rain | 10 to 15 mph W | 53% |
| Thursday Night | 38°F | Chance Light Rain then Cloudy | 10 mph N | 36% |
| Friday | 47°F | Mostly Cloudy | 10 to 15 mph N | 10% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph N | 1% |
| Saturday | 49°F | Sunny | 0 to 5 mph NW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 0 to 5 mph W | 2% |
| Sunday | 54°F | Sunny | 5 to 10 mph W | 7% |
| Sunday Night | 35°F | Mostly Clear | 0 to 5 mph W | 1% |
| Monday | 59°F | Mostly Sunny | 0 to 10 mph SW | 0% |
| Monday Night | 40°F | Partly Cloudy | 5 to 10 mph W | 1% |
| Tuesday | 59°F | Sunny | 5 to 10 mph NW | 2% |
| Tuesday Night | 38°F | Partly Cloudy | 0 to 5 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Waukesha, WI
Last spring frost
Apr 30
First fall frost
Oct 14
Growing season
164 days
Hardiness zone
5b
Explore more for Waukesha, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Brookfield Wwtp, Wi (2.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.