Holtsville, NY Weather & Growing Conditions
Overnight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. North wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Partly Cloudy | 10 mph N | 0% |
| Saturday | 68°F | Mostly Sunny | 12 mph E | 0% |
| Saturday Night | 57°F | Partly Cloudy | 5 to 9 mph SE | 2% |
| Sunday | 70°F | Showers And Thunderstorms | 7 to 15 mph SE | 78% |
| Sunday Night | 59°F | Showers And Thunderstorms | 6 to 13 mph SW | 90% |
| Monday | 68°F | Rain Showers Likely | 12 to 15 mph NE | 64% |
| Monday Night | 54°F | Chance Rain Showers | 9 to 15 mph NE | 27% |
| Tuesday | 65°F | Chance Rain Showers | 18 mph NE | 27% |
| Tuesday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 17 mph NE | 27% |
| Wednesday | 65°F | Mostly Cloudy then Slight Chance Rain Showers | 17 to 21 mph NE | 15% |
| Wednesday Night | 53°F | Chance Rain Showers | 15 to 18 mph NE | 36% |
| Thursday | 64°F | Chance Rain Showers | 21 mph NE | 36% |
| Thursday Night | 53°F | Chance Rain Showers | 13 to 17 mph NE | 36% |
| Friday | 67°F | Chance Rain Showers | 14 to 17 mph N | 35% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Holtsville, NY
Last spring frost
Apr 10
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7b
Explore more for Holtsville, NY: full frost dates · planting calendar · New York frost dates
Climate data from the nearest NOAA station, Islip Li Macarthur Ap, Ny (3.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.