Holtsville, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Holtsville, a community in Suffolk County, New York.
Overnight
56°F
Mostly Cloudy
Mostly cloudy, with a low around 56. Northeast wind around 8 mph.
7-day forecast for Holtsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Mostly Cloudy | 8 mph NE | 0% |
| Saturday | 69°F | Partly Sunny | 9 mph E | 0% |
| Saturday Night | 55°F | Partly Cloudy | 5 to 8 mph SE | 2% |
| Sunday | 70°F | Rain | 6 to 12 mph SE | 80% |
| Sunday Night | 56°F | Rain | 6 to 12 mph E | 88% |
| Monday | 68°F | Chance Light Rain | 9 to 15 mph NE | 45% |
| Monday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 14 mph NE | 21% |
| Tuesday | 64°F | Chance Rain Showers | 17 mph NE | 26% |
| Tuesday Night | 52°F | Chance Rain Showers | 14 to 17 mph NE | 26% |
| Wednesday | 65°F | Slight Chance Rain Showers | 21 mph NE | 19% |
| Wednesday Night | 52°F | Chance Rain Showers | 20 mph NE | 34% |
| Thursday | 65°F | Chance Rain Showers | 20 to 23 mph NE | 34% |
| Thursday Night | 52°F | Chance Rain Showers | 15 to 20 mph NE | 40% |
| Friday | 65°F | Chance Rain Showers | 20 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov) for Holtsville (40.812, -73.045). Updated through the day.
Growing snapshot for Holtsville
Last spring frost
Apr 10
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7b
More local growing data for Holtsville: nearby ZIP 11742 weather · frost dates · planting calendar · New York frost dates
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Climate data from the nearest NOAA station, Islip Li Macarthur Ap, Ny (3.3 mi from Holtsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.