Winthrop Weather Forecast

    • 60
    • 79

    Rain Showers Likely

    • 57
    • 78

    Partly Sunny

    • 57
    • 78

    Chance Rain Showers

    • 54
    • 76

    Rain Showers Likely

    • 50
    • 71

    Mostly Sunny

    • 53
    • 73

    Partly Sunny

    • 56
    • 75

    Chance Rain Showers

Today 10 Aug Northern St. Lawrence

Partly sunny this Morning, then mostly cloudy with a chance of Showers and Thunderstorms this afternoon. Highs in the upper 70s. Light and variable Winds, becoming southwest around 10 Mph this afternoon. Chance of rain 50 percent.

Tonight 10 Aug Northern St. Lawrence

Mostly cloudy with Showers likely with a chance of Thunderstorms until Midnight, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Lows around 60. Southwest Winds around 10 Mph until Midnight, becoming light and variable. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winthrop Temperature Statistics

August Temperature

Massena, Massena International-Richards Field (9.9 miles)

  • Lowest 5 August, 2026

    54.6 °F

  • Average August

    72.3 °F

  • Highest 6 August, 2026

    87.7 °F

Climate (2021–2026)

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

    56 °F
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