Winthrop Weather Forecast

    • 49
    • 73

    Mostly Sunny

    • 51
    • 72

    Chance Rain Showers

    • 45
    • 63

    Rain Showers

    • 34
    • 51

    Rain Showers Likely

    • 33
    • 46

    Chance Rain/Snow

    • 34
    • 45

    Chance Rain Showers

Today 27 Apr Northern St. Lawrence

Sunny. Highs in the lower 70s. Light and variable Winds.

Tonight 27 Apr Northern St. Lawrence

Mostly clear until Midnight, then becoming partly cloudy. Lows in the upper 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winthrop Temperature Statistics

April Temperature

Massena, Massena International-Richards Field (9.9 miles)

  • Lowest 8 April, 2026

    15.7 °F

  • Average April

    44.3 °F

  • Highest 18 April, 2026

    80.7 °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

    46.2 °F

  • Average High 2021–2026

    55.8 °F
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