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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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.