Jefferson Valley-Yorktown, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson Valley-Yorktown, a community in Westchester County, New York.
Today
68°F
Mostly Sunny
Mostly sunny, with a high near 68. East wind 2 to 6 mph.
7-day forecast for Jefferson Valley-Yorktown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 68°F | Mostly Sunny | 2 to 6 mph E | 0% |
| Tonight | 54°F | Mostly Cloudy | 3 mph SE | 8% |
| Sunday | 66°F | Rain | 3 to 7 mph SE | 91% |
| Sunday Night | 53°F | Rain | 3 to 9 mph NE | 86% |
| Monday | 65°F | Partly Sunny | 7 to 10 mph N | 11% |
| Monday Night | 48°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph NE | 19% |
| Tuesday | 60°F | Slight Chance Rain Showers | 8 mph NE | 22% |
| Tuesday Night | 46°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph NE | 22% |
| Wednesday | 62°F | Partly Sunny then Slight Chance Rain Showers | 12 mph NE | 16% |
| Wednesday Night | 46°F | Chance Rain Showers | 12 mph NE | 28% |
| Thursday | 60°F | Chance Rain Showers | 12 mph NE | 32% |
| Thursday Night | 47°F | Chance Rain Showers | 12 mph N | 37% |
| Friday | 62°F | Chance Rain Showers | 12 mph N | 35% |
| Friday Night | 48°F | Chance Rain Showers | 13 mph N | 32% |
Forecast source: National Weather Service (api.weather.gov) for Jefferson Valley-Yorktown (41.319, -73.800). Updated through the day.
Growing snapshot for Jefferson Valley-Yorktown
Last spring frost
Apr 30
First fall frost
Oct 17
Growing season
172 days
Hardiness zone
6b
More local growing data for Jefferson Valley-Yorktown: nearby ZIP 10535 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
Katonah
Lake Mohegan
Larchmont
Lincolndale
Mamaroneck
Millwood
Montrose
Climate data from the nearest NOAA station, Shrub Oak, Ny (2.2 mi from Jefferson Valley-Yorktown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.