Winthrop Weather Forecast

    • 28
    • 42

    Rain Showers Likely

    • 22
    • 37

    Partly Sunny

    • 36
    • 46

    Mostly Cloudy

    • 35
    • 53

    Partly Sunny

    • 36
    • 56

    Mostly Cloudy

    • 42
    • 59

    Chance Rain Showers

Today 19 Apr Northern St. Lawrence

Cloudy with Showers with a chance of snow Showers this Morning, then partly sunny with a chance of Showers this afternoon. Highs in the mid 40s. West Winds 10 to 15 Mph. Chance of precipitation 90 percent.

Tonight 19 Apr Northern St. Lawrence

Partly cloudy. A chance of rain Showers until Midnight, then a slight chance of snow Showers after midnight. Locally heavy rainfall possible until midnight. Little or no snow accumulation. Lows in the upper 20s. West Winds 10 to 15 Mph. Chance of precipitation 40 percent.

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Winthrop Temperature Statistics

April Temperature

Massena, Massena International-Richards Field (9.9 miles)

  • Lowest 8 April, 2026

    15.7 °F

  • Average April

    42.7 °F

  • Highest 3 April, 2026

    72.6 °F

Climate (2021–Present)

Massena, Massena International-Richards Field (9.9 miles)

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  • Average Low 2021–2026

    36.1 °F

  • Average 2021–2026

    46.1 °F

  • Average High 2021–2026

    55.8 °F
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