Westchester, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Westchester, a village in Cook County, Illinois.
This Afternoon
72°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy, with a high near 72. East northeast wind 10 to 15 mph. Chance of precipitation is 50%.
7-day forecast for Westchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Chance Rain Showers | 10 to 15 mph ENE | 45% |
| Tonight | 63°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 10 to 15 mph E | 47% |
| Saturday | 77°F | Showers And Thunderstorms Likely | 10 to 15 mph SE | 84% |
| 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 | 60% |
| Monday | 65°F | Chance Rain Showers | 15 mph ENE | 52% |
| Monday Night | 54°F | Chance Rain Showers | 10 to 15 mph ENE | 32% |
| Tuesday | 63°F | Slight Chance Rain Showers | 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 NNE | 10% |
| Wednesday Night | 55°F | Mostly Cloudy | 5 to 10 mph NNE | 3% |
| Thursday | 68°F | Partly Sunny | 5 to 10 mph NNE | 7% |
| Thursday Night | 56°F | Mostly Cloudy | 5 to 10 mph NNE | 4% |
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 Sep 18, 2026.