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
71°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny. High near 71, with temperatures falling to around 65 in the afternoon. Southwest wind 3 to 12 mph.
7-day forecast for Lake Ronkonkoma
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 71°F | Patchy Fog then Sunny | 3 to 12 mph SW | 3% |
| Tonight | 58°F | Partly Cloudy | 7 mph S | 2% |
| Thursday | 70°F | Slight Chance Rain Showers | 5 to 12 mph S | 17% |
| Thursday Night | 60°F | Rain Showers | 6 to 9 mph SW | 84% |
| Friday | 67°F | Showers And Thunderstorms | 7 mph S | 92% |
| Friday Night | 55°F | Showers And Thunderstorms | 7 mph W | 92% |
| Saturday | 65°F | Rain Showers Likely | 9 mph NW | 60% |
| Saturday Night | 43°F | Slight Chance Rain Showers | 9 mph NW | 20% |
| Sunday | 59°F | Slight Chance Rain Showers then Mostly Sunny | 10 mph W | 18% |
| Sunday Night | 40°F | Partly Cloudy | 7 to 10 mph W | 14% |
| Monday | 59°F | Chance Light Rain | 10 to 16 mph NW | 25% |
| Monday Night | 39°F | Chance Light Rain | 13 mph W | 25% |
| Tuesday | 59°F | Slight Chance Light Rain then Mostly Sunny | 14 to 17 mph W | 19% |
| Tuesday Night | 40°F | Mostly Clear | 14 mph W | 7% |
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 Nov 4, 2026.