Westchester County, New York
Local growing conditions for Westchester County: the USDA hardiness zones found here, frost dates, and live weather for communities across the county. Based on 74 ZIP codes in our data.
Hardiness zones in Westchester County
Westchester County spans these USDA plant hardiness zones (by number of ZIP codes):
Local weather & frost dates
Open any community in Westchester County for its live forecast, frost dates, and planting calendar:
Ardsley 10502
Shrub Oak 10588
Jefferson Valley-Yorktown 10501
Irvington 10503
Armonk 10504
Mahopac 10505
Bedford 10506
Bedford Hills 10507
Briarcliff Manor 10510
Buchanan 10511
Chappaqua 10514
Lake Mohegan 10517
West Mountain 10518
Heritage Hills 10519
Croton-on-Hudson 10520
Dobbs Ferry 10522
Elmsford 10523
Golden's Bridge 10526
Jefferson Valley-Yorktown 10527
Harrison 10528
Hartsdale 10530
Hawthorne 10532
Irvington 10533
Jefferson Valley-Yorktown 10535
More for New York
- Agriculture in New York
- Frost dates across New York
- USDA hardiness zones explained
- Planting calendar by ZIP code
County growing conditions are compiled from our ZIP-code database, USDA hardiness-zone data, and NOAA climate normals. Conditions vary within a county by elevation and local microclimate. Page updated Aug 4, 2026.