South Valley Stream, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for South Valley Stream, a community in Nassau County, New York.
Today
71°F
Sunny
Sunny. High near 71, with temperatures falling to around 66 in the afternoon. South wind 8 to 13 mph.
7-day forecast for South Valley Stream
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Sunny | 8 to 13 mph S | 0% |
| Tonight | 59°F | Partly Cloudy | 7 to 12 mph S | 0% |
| Thursday | 70°F | Mostly Cloudy | 7 to 13 mph S | 10% |
| Thursday Night | 61°F | Showers And Thunderstorms Likely | 3 to 12 mph S | 70% |
| Friday | 68°F | Showers And Thunderstorms | 6 mph S | 92% |
| Friday Night | 55°F | Showers And Thunderstorms | 5 mph W | 75% |
| Saturday | 65°F | Mostly Sunny | 6 to 10 mph W | 14% |
| Saturday Night | 47°F | Slight Chance Light Rain | 10 mph W | 19% |
| Sunday | 61°F | Slight Chance Light Rain then Mostly Sunny | 12 mph NW | 15% |
| Sunday Night | 46°F | Partly Cloudy | 10 mph W | 6% |
| Monday | 60°F | Slight Chance Light Rain | 10 to 15 mph W | 15% |
| Monday Night | 44°F | Mostly Clear | 10 mph W | 11% |
| Tuesday | 62°F | Sunny | 10 to 14 mph W | 4% |
| Tuesday Night | 45°F | Mostly Clear | 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov) for South Valley Stream (40.656, -73.719). Updated through the day.
Growing snapshot for South Valley Stream
Last spring frost
Apr 2
First fall frost
Nov 14
Growing season
226 days
Hardiness zone
7b
More local growing data for South Valley Stream: nearby ZIP 11581 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, New York Jfk Intl Ap, Ny (2.6 mi from South Valley Stream). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.