Brookfield, WI Weather & Growing Conditions
Tonight
59°F
Light Rain
Rain. Cloudy, with a low around 59. South wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Light Rain | 5 to 10 mph S | 83% |
| Wednesday | 62°F | Chance Light Rain then Cloudy | 10 to 15 mph S | 45% |
| Wednesday Night | 47°F | Cloudy | 15 mph SW | 13% |
| Thursday | 55°F | Cloudy then Light Rain Likely | 10 to 15 mph W | 60% |
| Thursday Night | 40°F | Chance Light Rain | 5 to 10 mph NW | 54% |
| Friday | 50°F | Chance Light Rain | 10 to 15 mph N | 25% |
| Friday Night | 34°F | Mostly Cloudy | 0 to 10 mph N | 7% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 3% |
| Saturday Night | 35°F | Partly Cloudy | 0 to 5 mph W | 8% |
| Sunday | 58°F | Mostly Sunny then Slight Chance Light Rain | 5 to 10 mph W | 18% |
| Sunday Night | 36°F | Partly Cloudy | 5 to 10 mph W | 6% |
| Monday | 59°F | Mostly Sunny | 5 to 15 mph W | 2% |
| Monday Night | 40°F | Partly Cloudy | 5 to 10 mph W | 2% |
| Tuesday | 59°F | Sunny | 5 to 10 mph NW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Brookfield, WI
Last spring frost
Apr 26
First fall frost
Oct 18
Growing season
173 days
Hardiness zone
5b
Explore more for Brookfield, WI: full frost dates · planting calendar · Wisconsin frost dates
Climate data from the nearest NOAA station, Mt Mary College, Wi (3.6 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.