Willowbrook, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Willowbrook, a community in Lake County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South wind around 5 mph, with gusts as high as 15 mph.
7-day forecast for Willowbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 mph S | 0% |
| Tonight | 64°F | Partly Cloudy | 5 mph SSW | 2% |
| Wednesday | 81°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 mph SW | 39% |
| Wednesday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph SW | 88% |
| Thursday | 78°F | Showers And Thunderstorms Likely | 0 to 5 mph S | 88% |
| Thursday Night | 62°F | Chance Showers And Thunderstorms | 0 to 5 mph SE | 51% |
| Friday | 82°F | Mostly Sunny | 0 to 5 mph SW | 6% |
| Friday Night | 63°F | Partly Cloudy | 0 mph | 8% |
| Saturday | 84°F | Mostly Sunny | 0 to 5 mph SSW | 9% |
| Saturday Night | 68°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSW | 15% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 15 mph SW | 15% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 39% |
| Monday | 85°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 39% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 45% |
Forecast source: National Weather Service (api.weather.gov) for Willowbrook (41.448, -87.532). Updated through the day.
Growing snapshot for Willowbrook
Last spring frost
Apr 23
First fall frost
Oct 20
Growing season
179 days
Hardiness zone
6a
More local growing data for Willowbrook: nearby ZIP 46311 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Park Forest, Il (9 mi from Willowbrook). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.