Thornwood, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Thornwood, a community in Westchester County, New York.
Overnight
53°F
Mostly Cloudy
Mostly cloudy. Low around 53, with temperatures rising to around 56 overnight. North wind around 7 mph.
7-day forecast for Thornwood
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 53°F | Mostly Cloudy | 7 mph N | 0% |
| Saturday | 69°F | Partly Sunny | 7 mph E | 0% |
| Saturday Night | 55°F | Mostly Cloudy | 2 to 6 mph SE | 4% |
| Sunday | 68°F | Rain | 3 to 7 mph SE | 96% |
| Sunday Night | 53°F | Rain | 3 to 12 mph E | 92% |
| Monday | 67°F | Slight Chance Light Rain then Partly Sunny | 7 to 12 mph N | 23% |
| Monday Night | 49°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 9 mph NE | 20% |
| Tuesday | 62°F | Slight Chance Rain Showers | 10 mph NE | 24% |
| Tuesday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 8 to 13 mph NE | 23% |
| Wednesday | 63°F | Partly Sunny then Slight Chance Rain Showers | 14 mph NE | 18% |
| Wednesday Night | 48°F | Chance Rain Showers | 15 mph NE | 30% |
| Thursday | 62°F | Chance Rain Showers | 13 to 16 mph NE | 32% |
| Thursday Night | 48°F | Chance Rain Showers | 13 to 16 mph NE | 38% |
| Friday | 64°F | Chance Rain Showers | 14 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov) for Thornwood (41.118, -73.779). Updated through the day.
Growing snapshot for Thornwood
Last spring frost
Apr 12
First fall frost
Oct 31
Growing season
200 days
Hardiness zone
7a
More local growing data for Thornwood: nearby ZIP 10594 weather · frost dates · planting calendar · New York frost dates
Nearby towns & communities
Ardsley
Armonk
Bedford
Bedford Hills
Briarcliff Manor
Bronxville
Buchanan
Chappaqua
Crompond
Croton-on-Hudson
Crugers
Dobbs Ferry
Eastchester
Elmsford
Fairview
Golden's Bridge
Greenville
Harrison
Hartsdale
Hastings-on-Hudson
Hawthorne
Heritage Hills
Irvington
Jefferson Valley-Yorktown
Katonah
Lake Mohegan
Larchmont
Lincolndale
Mamaroneck
Millwood
Climate data from the nearest NOAA station, Westchester Co Ap, Ny (4.7 mi from Thornwood). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.