Westchester, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westchester, a village in Cook County, Illinois.
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. South southwest wind around 10 mph.
7-day forecast for Westchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 10 mph SSW | 0% |
| Tonight | 69°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SSW | 22% |
| Wednesday | 81°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 5 mph SW | 68% |
| Wednesday Night | 66°F | Showers And Thunderstorms | 5 mph W | 90% |
| Thursday | 79°F | Rain Showers Likely | 0 to 5 mph NE | 72% |
| Thursday Night | 64°F | Chance Showers And Thunderstorms then Partly Cloudy | 0 to 5 mph SSE | 28% |
| 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 SW | 9% |
| Saturday Night | 71°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 to 10 mph SSW | 18% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 10 to 15 mph SW | 18% |
| Sunday Night | 72°F | Chance Showers And Thunderstorms | 5 to 10 mph SSW | 43% |
| Monday | 86°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 43% |
| Monday Night | 71°F | Chance Showers And Thunderstorms | 5 to 10 mph WSW | 47% |
Forecast source: National Weather Service (api.weather.gov) for Westchester (41.849, -87.891). Updated through the day.
Growing snapshot for Westchester
Last spring frost
Apr 11
First fall frost
Oct 31
Growing season
201 days
Hardiness zone
6a
More local growing data for Westchester: nearby ZIP 60154 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 Midway Ap, Il (8.3 mi from Westchester). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.