Oak Brook, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Brook, a village in Dupage County, Illinois.
This Afternoon
72°F
Slight Chance Rain Showers
A slight chance of rain showers. Mostly cloudy, with a high near 72. East wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
7-day forecast for Oak Brook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Slight Chance Rain Showers | 10 mph E | 19% |
| Tonight | 63°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 to 15 mph ESE | 47% |
| Saturday | 77°F | Showers And Thunderstorms Likely | 10 to 15 mph SE | 83% |
| Saturday Night | 65°F | Showers And Thunderstorms Likely then Showers And Thunderstorms | 5 to 10 mph NE | 81% |
| Sunday | 69°F | Showers And Thunderstorms | 10 to 15 mph NNE | 81% |
| Sunday Night | 57°F | Rain Showers Likely | 15 mph NE | 61% |
| Monday | 64°F | Chance Rain Showers | 15 mph ENE | 51% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 32% |
| Tuesday | 63°F | Slight Chance Rain Showers | 10 to 15 mph NE | 23% |
| Tuesday Night | 54°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 15 mph NE | 18% |
| Wednesday | 65°F | Partly Sunny | 10 mph NE | 10% |
| Wednesday Night | 54°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Thursday Night | 56°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
Forecast source: National Weather Service (api.weather.gov) for Oak Brook (41.836, -87.953). Updated through the day.
Growing snapshot for Oak Brook
Last spring frost
Apr 28
First fall frost
Oct 16
Growing season
169 days
Hardiness zone
6a
More local growing data for Oak Brook: nearby ZIP 60523 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
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Bensenville
Bloomingdale
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Darien
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Hanover Park
Hinsdale
Itasca
Lisle
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Naperville
Oakbrook Terrace
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Villa Park
Warrenville
Wayne
West Chicago
Westmont
Wheaton
Willowbrook
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Wood Dale
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Climate data from the nearest NOAA station, Lisle-Morton Arboretum, Il (6.4 mi from Oak Brook). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.