Lake Ronkonkoma, NY Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lake Ronkonkoma, a community in Suffolk County, New York.
Today
70°F
Partly Sunny
Partly sunny. High near 70, with temperatures falling to around 67 in the afternoon. East wind around 9 mph.
7-day forecast for Lake Ronkonkoma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Partly Sunny | 9 mph E | 0% |
| Tonight | 55°F | Mostly Cloudy | 8 mph SE | 2% |
| Sunday | 71°F | Rain | 7 to 12 mph SE | 81% |
| Sunday Night | 57°F | Rain | 7 to 12 mph E | 87% |
| Monday | 68°F | Chance Light Rain | 9 to 15 mph NE | 44% |
| Monday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 7 to 14 mph NE | 21% |
| Tuesday | 65°F | Chance Rain Showers | 16 mph NE | 25% |
| Tuesday Night | 52°F | Chance Rain Showers | 15 to 18 mph NE | 25% |
| Wednesday | 65°F | Slight Chance Rain Showers | 18 to 22 mph NE | 19% |
| 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 | 52°F | Chance Rain Showers | 16 to 21 mph NE | 40% |
| Friday | 66°F | Chance Rain Showers | 21 mph N | 37% |
| Friday Night | 52°F | Chance Rain Showers | 21 mph N | 37% |
Forecast source: National Weather Service (api.weather.gov) for Lake Ronkonkoma (40.830, -73.113). Updated through the day.
Growing snapshot for Lake Ronkonkoma
Last spring frost
Apr 10
First fall frost
Nov 2
Growing season
207 days
Hardiness zone
7b
More local growing data for Lake Ronkonkoma: nearby ZIP 11779 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 (1.5 mi from Lake Ronkonkoma). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.