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
73°F
Sunny
Sunny. High near 73, with temperatures falling to around 65 in the afternoon. South wind 2 to 7 mph.
7-day forecast for Jefferson Valley-Yorktown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Sunny | 2 to 7 mph S | 0% |
| Tonight | 55°F | Mostly Cloudy | 5 mph S | 0% |
| Thursday | 70°F | Chance Rain Showers | 8 mph S | 36% |
| Thursday Night | 59°F | Rain Showers Likely | 2 to 6 mph S | 73% |
| Friday | 68°F | Rain Showers | 2 mph S | 76% |
| Friday Night | 50°F | Rain Showers Likely | 3 mph N | 63% |
| Saturday | 63°F | Mostly Sunny then Slight Chance Rain Showers | 6 mph NW | 17% |
| Saturday Night | 43°F | Chance Light Rain | 7 mph W | 26% |
| Sunday | 56°F | Slight Chance Light Rain then Mostly Sunny | 5 to 8 mph NW | 15% |
| Sunday Night | 39°F | Partly Cloudy | 6 mph W | 4% |
| Monday | 56°F | Sunny | 7 to 10 mph W | 10% |
| Monday Night | 37°F | Mostly Clear | 6 mph W | 10% |
| Tuesday | 59°F | Mostly Sunny | 6 to 9 mph SW | 5% |
| Tuesday Night | 38°F | Mostly Clear | 6 mph W | 1% |
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
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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 Nov 4, 2026.