Stony Brook University, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Stony Brook University, a community in Suffolk County, New York.
Today
69°F
Partly Sunny
Partly sunny. High near 69, with temperatures falling to around 67 in the afternoon. East wind 8 to 12 mph.
7-day forecast for Stony Brook University
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Partly Sunny | 8 to 12 mph E | 0% |
| Tonight | 55°F | Mostly Cloudy | 7 mph SE | 2% |
| Sunday | 71°F | Rain | 7 to 12 mph SE | 86% |
| Sunday Night | 56°F | Rain | 7 to 13 mph E | 86% |
| Monday | 68°F | Chance Light Rain then Mostly Cloudy | 9 to 15 mph NE | 41% |
| Monday Night | 54°F | Mostly Cloudy then Slight Chance Rain Showers | 9 to 14 mph NE | 21% |
| Tuesday | 65°F | Chance Rain Showers | 16 mph NE | 25% |
| Tuesday Night | 53°F | Chance Rain Showers | 15 to 20 mph NE | 25% |
| Wednesday | 65°F | Slight Chance Rain Showers | 22 mph NE | 18% |
| Wednesday Night | 53°F | Chance Rain Showers | 22 mph NE | 33% |
| Thursday | 65°F | Chance Rain Showers | 23 mph NE | 34% |
| Thursday Night | 52°F | Chance Rain Showers | 18 to 22 mph NE | 40% |
| Friday | 65°F | Chance Rain Showers | 21 mph N | 37% |
| Friday Night | 53°F | Chance Rain Showers | 22 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov) for Stony Brook University (40.910, -73.122). Updated through the day.
Growing snapshot for Stony Brook University
Last spring frost
Apr 15
First fall frost
Nov 10
Growing season
208 days
Hardiness zone
7b
More local growing data for Stony Brook University: nearby ZIP 11790 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Setauket Strong, Ny (3.7 mi from Stony Brook University). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.