Locust Valley, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Locust Valley, a community in Nassau County, New York.
This Afternoon
80°F
Sunny
Sunny. High near 80, with temperatures falling to around 78 in the afternoon. North wind around 9 mph.
7-day forecast for Locust Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Sunny | 9 mph N | 0% |
| Tonight | 58°F | Partly Cloudy | 7 to 13 mph N | 0% |
| Saturday | 69°F | Mostly Sunny | 6 to 13 mph E | 0% |
| Saturday Night | 58°F | Mostly Cloudy | 8 mph SE | 13% |
| Sunday | 70°F | Showers And Thunderstorms | 6 to 13 mph SE | 84% |
| Sunday Night | 61°F | Showers And Thunderstorms | 6 to 13 mph W | 88% |
| Monday | 67°F | Chance Rain Showers | 14 mph NE | 48% |
| Monday Night | 56°F | Chance Rain Showers | 12 to 17 mph NE | 28% |
| Tuesday | 64°F | Chance Rain Showers | 18 mph NE | 27% |
| Tuesday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 21 mph NE | 27% |
| Wednesday | 64°F | Mostly Cloudy | 21 mph NE | 14% |
| Wednesday Night | 54°F | Chance Rain Showers | 23 mph NE | 35% |
| Thursday | 63°F | Chance Rain Showers | 17 to 21 mph NE | 35% |
| Thursday Night | 54°F | Chance Rain Showers | 16 to 20 mph NE | 35% |
Forecast source: National Weather Service (api.weather.gov) for Locust Valley (40.878, -73.589). Updated through the day.
Growing snapshot for Locust Valley
Last spring frost
Apr 2
First fall frost
Nov 12
Growing season
224 days
Hardiness zone
7b
More local growing data for Locust Valley: nearby ZIP 11560 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Mineola, Ny (10.3 mi from Locust Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.