Winnetka, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Winnetka, a village in Cook County, Illinois.
Today
84°F
Mostly Sunny
Mostly sunny, with a high near 84. South wind 5 to 10 mph, with gusts as high as 20 mph.
7-day forecast for Winnetka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Mostly Sunny | 5 to 10 mph S | 1% |
| Tonight | 70°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 26% |
| Wednesday | 79°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph W | 72% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 5 mph NNW | 89% |
| Thursday | 76°F | Rain Showers Likely then Slight Chance Showers And Thunderstorms | 5 mph N | 66% |
| Thursday Night | 65°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph S | 19% |
| Friday | 78°F | Mostly Sunny | 0 to 5 mph NNW | 3% |
| Friday Night | 66°F | Mostly Clear | 0 to 5 mph SSE | 8% |
| Saturday | 85°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SSW | 15% |
| Saturday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 mph SSW | 21% |
| Sunday | 86°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 21% |
| Sunday Night | 70°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 46% |
| Monday | 84°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 46% |
| Monday Night | 70°F | Chance Showers And Thunderstorms | 5 mph SW | 49% |
Forecast source: National Weather Service (api.weather.gov) for Winnetka (42.106, -87.743). Updated through the day.
Growing snapshot for Winnetka
Last spring frost
Apr 26
First fall frost
Oct 21
Growing season
176 days
Hardiness zone
6a
More local growing data for Winnetka: nearby ZIP 60093 weather · frost dates · planting calendar · Illinois frost dates
Nearby towns & communities
Alsip
Arbury Hills
Arlington Heights
Barrington
Barrington Hills
Bedford Park
Bellwood
Berkeley
Berwyn
Blue Island
Bridgeview
Broadview
Brookfield
Burbank
Burnham
Calumet City
Calumet Park
Chicago
Chicago Heights
Chicago Ridge
Cicero
Country Club Hills
Countryside
Crestwood
Crete
Des Plaines
Dixmoor
Dolton
East Hazel Crest
Elk Grove Village
Climate data from the nearest NOAA station, Chicago Botanic Garden, Il (3 mi from Winnetka). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.