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Winthrop, NY Weather Forecast
Winthrop, NY Weather Forecast Date: 400 PM EDT Mon Sep 21 2026
The area/counties/county of: Northern St. Lawrence, including the cities of: Massena and Norfolk.or toggle through each period.
Tonight... Partly cloudy until midnight, then becoming mostly cloudy. Lows around 40. Light and variable winds.
Tuesday... Sunny. Highs in the lower 60s. Northeast winds around 10 mph.
Tuesday Night... Clear. Lows in the upper 30s. Northeast winds around 10 mph until midnight, becoming light and variable.
Wednesday... Sunny. Highs in the mid 60s. Northeast winds around 10 mph.
Wednesday Night... Clear. Lows around 40. Northeast winds around 10 mph.
Thursday... Sunny. Highs in the mid 60s.
Thursday Night... Mostly clear. Lows in the lower 40s.
Friday... Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.
Saturday... Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.
Sunday... Partly cloudy. Highs in the upper 60s. Lows in the upper 40s.
POP = Probability of Precipitation
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