Winthrop Weather Forecast

    • 57
    • 72

    Rain Showers Likely

    • 60
    • 80

    Sunny

    • 66
    • 84

    Mostly Sunny

    • 66
    • 82

    Rain Showers Likely

    • 63
    • 81

    Rain Showers Likely

    • 65
    • 82

    Slight Chance Thunderstorms

    • 65
    • 83

    Chance Rain Showers

Today 3 Aug Northern St. Lawrence

A slight chance of Thunderstorms late this morning. Showers likely. Some Thunderstorms may produce heavy rainfall late this morning. Highs in the mid 70s. West Winds 10 to 15 Mph. Gusts up to 30 Mph this afternoon. Chance of rain 70 percent.

Tonight 3 Aug Northern St. Lawrence

Partly cloudy with isolated Showers until Midnight, then clear after midnight. Lows in the mid 50s. Southwest Winds 10 to 15 Mph. Chance of rain 20 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 1 August, 2026

    61 °F

  • Average August

    72.6 °F

  • Highest 1 August, 2026

    82 °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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