Lake Ronkonkoma, NY Weather & Growing Conditions
Today
70°F
Partly Sunny
Partly sunny. High near 70, with temperatures falling to around 67 in the afternoon. East wind around 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Partly Sunny | 10 mph E | 0% |
| Tonight | 55°F | Mostly Cloudy | 6 to 9 mph SE | 2% |
| Sunday | 71°F | Rain | 7 to 13 mph SE | 80% |
| Sunday Night | 56°F | Rain | 7 to 13 mph E | 87% |
| Monday | 68°F | Chance Light Rain | 12 to 17 mph NE | 45% |
| Monday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 10 to 15 mph NE | 21% |
| Tuesday | 65°F | Chance Rain Showers | 18 mph NE | 26% |
| Tuesday Night | 52°F | Chance Rain Showers | 18 mph NE | 26% |
| Wednesday | 65°F | Slight Chance Rain Showers | 18 to 22 mph NE | 20% |
| Wednesday Night | 52°F | Chance Rain Showers | 21 mph NE | 34% |
| Thursday | 65°F | Chance Rain Showers | 21 to 24 mph NE | 34% |
| Thursday Night | 51°F | Chance Rain Showers | 17 to 21 mph NE | 40% |
| Friday | 66°F | Chance Rain Showers | 18 to 22 mph N | 37% |
| Friday Night | 52°F | Chance Rain Showers | 21 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Lake Ronkonkoma, NY
Last spring frost
Apr 10
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7b
Explore more for Lake Ronkonkoma, NY: full frost dates · planting calendar · New York frost dates
Climate data from the nearest NOAA station, Islip Li Macarthur Ap, Ny (1.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.