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
Partly Sunny
Partly sunny, with a high near 71. East wind around 12 mph.
7-day forecast for South Valley Stream
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Partly Sunny | 12 mph E | 0% |
| Tonight | 62°F | Mostly Cloudy | 10 mph SE | 3% |
| Sunday | 73°F | Rain | 9 to 13 mph SE | 82% |
| Sunday Night | 60°F | Rain | 7 to 12 mph SE | 84% |
| Monday | 70°F | Chance Light Rain | 10 to 14 mph NE | 45% |
| Monday Night | 57°F | Slight Chance Light Rain then Slight Chance Rain Showers | 8 to 13 mph NE | 23% |
| Tuesday | 67°F | Chance Rain Showers | 14 to 17 mph NE | 28% |
| Tuesday Night | 55°F | Chance Rain Showers | 17 mph NE | 27% |
| Wednesday | 67°F | Slight Chance Rain Showers | 17 to 21 mph NE | 23% |
| Wednesday Night | 55°F | Chance Rain Showers | 20 mph NE | 32% |
| Thursday | 67°F | Chance Rain Showers | 18 to 22 mph NE | 33% |
| Thursday Night | 54°F | Chance Rain Showers | 16 to 20 mph NE | 38% |
| Friday | 68°F | Chance Rain Showers | 17 mph N | 38% |
| Friday Night | 55°F | Chance Rain Showers | 17 mph N | 34% |
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 Sep 19, 2026.