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Brookfield, WI Weather & Growing Conditions

This Afternoon
65°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms between 3pm and 5pm, then showers and thunderstorms likely. Cloudy, with a high near 65. 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

WhenTempForecastWindPrecip
This Afternoon 65°F Chance Showers And Thunderstorms 0 to 5 mph E 57%
Tonight 61°F Showers And Thunderstorms 5 to 10 mph NE 76%
Sunday 64°F Chance Rain Showers then Mostly Cloudy 10 to 15 mph NE 30%
Sunday Night 54°F Mostly Cloudy 10 to 15 mph NE 5%
Monday 61°F Slight Chance Rain Showers 10 to 15 mph NE 21%
Monday Night 50°F Cloudy then Slight Chance Rain Showers 5 to 15 mph NE 16%
Tuesday 60°F Slight Chance Rain Showers then Mostly Cloudy 10 to 15 mph NE 16%
Tuesday Night 50°F Partly Cloudy 5 to 10 mph NE 7%
Wednesday 62°F Mostly Sunny 5 to 10 mph NE 6%
Wednesday Night 50°F Partly Cloudy 5 to 10 mph NE 2%
Thursday 64°F Mostly Sunny 5 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 51°F Partly Cloudy 0 to 5 mph NE 3%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Brookfield, WI

Last spring frost
Apr 30
First fall frost
Oct 14
Growing season
164 days
Hardiness zone
5b

Explore more for Brookfield, WI: full frost dates · planting calendar · Wisconsin frost dates

Climate data from the nearest NOAA station, Brookfield Wwtp, Wi (1.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.