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Winthrop, NY Weather Forecast
Winthrop, NY Weather Forecast Date: 219 AM EDT Tue Sep 29 2026
The area/counties/county of: Northern St. Lawrence, including the cities of: Massena and Norfolk.or toggle through each period.
Today... Cloudy this morning, then becoming partly sunny. Highs in the mid 60s. Light and variable winds.
Tonight... Clear until midnight, then becoming partly cloudy. Lows in the mid 40s. Light and variable winds.
Wednesday... Partly sunny in the morning, then becoming mostly cloudy. Highs in the lower 70s. Light and variable winds.
Wednesday Night... Partly cloudy. Lows around 60. Southwest winds around 10 mph.
Thursday... Mostly cloudy. Highs in the mid 70s. Southwest winds 10 to 15 mph with gusts up to 30 mph.
Thursday Night... Mostly cloudy with a 50% chance of showers. Lows in the upper 50s. Highs in the upper 60s.
Friday... Mostly cloudy with a 50% chance of showers. Lows in the upper 50s. Highs in the upper 60s.
Friday Night... Partly cloudy. Lows in the lower 40s.
Saturday... Mostly sunny. Highs in the mid 60s.
Saturday Night... Partly cloudy. Lows in the upper 30s.
Sunday... Partly sunny with a 40% chance of showers. Highs in the mid 60s.
Sunday Night... Partly cloudy. Lows around 40. Highs in the upper 50s.
POP = Probability of Precipitation
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