Westchester, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westchester, a village in Cook County, Illinois.
This Afternoon
73°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. High near 73, with temperatures falling to around 70 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 40%.
7-day forecast for Westchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Chance Rain Showers | 15 mph S | 37% |
| Tonight | 61°F | Rain Showers | 15 mph S | 83% |
| Wednesday | 64°F | Rain Showers Likely | 15 mph SSW | 58% |
| Wednesday Night | 49°F | Mostly Cloudy | 15 mph SW | 14% |
| Thursday | 58°F | Chance Rain Showers | 10 to 15 mph WSW | 27% |
| Thursday Night | 44°F | Chance Rain Showers | 5 to 10 mph WNW | 47% |
| Friday | 53°F | Chance Rain Showers | 10 to 15 mph N | 33% |
| Friday Night | 39°F | Mostly Cloudy | 5 to 10 mph NNW | 12% |
| Saturday | 52°F | Mostly Sunny | 5 mph WNW | 10% |
| Saturday Night | 38°F | Partly Cloudy | 5 mph WSW | 6% |
| Sunday | 57°F | Mostly Sunny then Slight Chance Rain | 5 to 10 mph W | 15% |
| Sunday Night | 39°F | Mostly Clear | 5 to 10 mph W | 10% |
| Monday | 60°F | Sunny | 5 to 15 mph WSW | 5% |
| Monday Night | 43°F | Mostly Clear | 5 to 10 mph W | 2% |
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
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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 Nov 4, 2026.