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Sylvia Lake, NY Weather Forecast
Sylvia Lake, NY Weather Forecast Date: 625 PM EDT Wed Sep 02 2026
The area/counties/county of: Southwestern St. Lawrence, including the cities of: Ogdensburg, Potsdam, and Gouverneur.or toggle through each period.
Tonight... Showers likely with a chance of thunderstorms until midnight, then a chance of showers with a slight chance of thunderstorms after midnight. Some thunderstorms May produce heavy rainfall until midnight. Some thunderstorms May produce heavy rainfall after midnight. Lows in the mid 60s. Southwest winds 10 to 15 mph. Chance of rain 70%.
Thursday... Partly sunny. A slight chance of showers in the afternoon. Humid with highs in the upper 70s. Light and variable winds, becoming west around 10 mph in the afternoon. Chance of rain 20%.
Thursday Night... Partly cloudy. Lows around 60. Light and variable winds.
Friday... Partly sunny. Highs in the mid 70s. Northwest winds around 10 mph.
Friday Night... Mostly clear. Lows in the mid 50s. Light and variable winds.
Saturday... Partly sunny. Highs in the lower 70s.
Saturday Night... Mostly clear. Lows in the lower 50s.
Sunday... Clear. Highs in the lower 70s. Lows in the lower 50s.
Sunday Night... Clear. Highs in the lower 70s. Lows in the lower 50s.
Labor Day... Partly sunny. Highs in the mid 70s.
Monday Night... Partly cloudy with a 30% chance of showers. Lows in the mid 50s.
Tuesday... Partly cloudy. Highs around 70. Lows in the lower 50s.
Tuesday Night... Partly cloudy. Highs around 70. Lows in the lower 50s.
POP = Probability of Precipitation
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