Winthrop Weather Forecast

    • 63
    • 79

    Mostly Cloudy

    • 62
    • 82

    Rain Showers Likely

    • 52
    • 73

    Chance Rain Showers

    • 56
    • 74

    Mostly Sunny

    • 59
    • 79

    Mostly Sunny

    • 63
    • 83

    Partly Sunny

    • 64
    • 83

    Rain Showers Likely

Today 20 Jul Northern St. Lawrence

Sunny. Highs in the upper 70s. Southwest Winds around 10 Mph.

Tonight 20 Jul Northern St. Lawrence

Partly cloudy until Midnight, then becoming mostly cloudy. Lows in the lower 60s. South Winds around 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winthrop Temperature Statistics

July Temperature

Massena, Massena International-Richards Field (9.9 miles)

  • Lowest 17 July, 2026

    51.7 °F

  • Average July

    72 °F

  • Highest 1 July, 2026

    91.7 °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

    55.9 °F
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