Oak Brook, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Oak Brook, a village in Dupage County, Illinois.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. South southwest wind around 10 mph.
7-day forecast for Oak Brook
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 10 mph SSW | 0% |
| Tonight | 69°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSW | 24% |
| Wednesday | 81°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph SW | 69% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 5 mph W | 90% |
| Thursday | 79°F | Rain Showers Likely | 0 to 5 mph NE | 70% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSE | 26% |
| Friday | 83°F | Mostly Sunny | 0 to 5 mph S | 4% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph S | 8% |
| Saturday | 85°F | Mostly Sunny | 5 to 10 mph SSW | 9% |
| Saturday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 18% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 18% |
| Sunday Night | 71°F | Chance Showers And Thunderstorms | 5 to 15 mph SSW | 42% |
| Monday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 42% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 10 mph SW | 46% |
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
Addison
Bartlett
Bensenville
Bloomingdale
Burr Ridge
Carol Stream
Clarendon Hills
Darien
Downers Grove
Elmhurst
Glen Ellyn
Glendale Heights
Hanover Park
Hinsdale
Itasca
Lisle
Lombard
Naperville
Oakbrook Terrace
Roselle
Villa Park
Warrenville
Wayne
West Chicago
Westmont
Wheaton
Willowbrook
Winfield
Wood Dale
Woodridge
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 Aug 4, 2026.