Willowbrook, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Willowbrook, a village in Dupage County, Illinois.
Tonight
65°F
Showers And Thunderstorms
Showers and thunderstorms before 1am, then patchy fog and showers and thunderstorms. Some of the storms could produce heavy rain. Cloudy. Low around 65, with temperatures rising to around 68 overnight. East wind around 5 mph, with gusts as high as 15 mph. Chance of precipitation is 100%. New rainfall amounts between 2 and 3 inches possible.
7-day forecast for Willowbrook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 65°F | Showers And Thunderstorms | 5 mph E | 97% |
| Sunday | 67°F | Patchy Fog | 10 to 15 mph NNE | 86% |
| Sunday Night | 58°F | Chance Rain Showers | 15 mph ENE | 30% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 40% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 15 mph ENE | 27% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 28% |
| Tuesday Night | 55°F | Slight Chance Rain Showers then Mostly Cloudy | 10 to 15 mph NE | 18% |
| Wednesday | 64°F | Mostly Cloudy | 10 mph NE | 13% |
| Wednesday Night | 55°F | Mostly Cloudy | 5 to 10 mph NE | 6% |
| Thursday | 67°F | Partly Sunny | 5 to 10 mph NE | 3% |
| Thursday Night | 56°F | Mostly Cloudy | 5 mph NE | 10% |
| Friday | 72°F | Partly Sunny | 5 to 10 mph NE | 9% |
| Friday Night | 56°F | Partly Cloudy | 0 to 10 mph NE | 3% |
| Saturday | 74°F | Mostly Sunny | 0 to 5 mph NE | 5% |
Forecast source: National Weather Service (api.weather.gov) for Willowbrook (41.767, -87.942). Updated through the day.
Growing snapshot for Willowbrook
Last spring frost
Apr 19
First fall frost
Oct 22
Growing season
183 days
Hardiness zone
6a
More local growing data for Willowbrook: nearby ZIP 60527 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Little Red School Hse, Il (3.6 mi from Willowbrook). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.