Winthrop Weather Forecast

    • 61
    • 83

    Mostly Cloudy

    • 63
    • 84

    Mostly Sunny

    • 67
    • 87

    Partly Sunny

    • 65
    • 86

    Rain Showers Likely

    • 60
    • 80

    Chance Rain Showers

    • 60
    • 80

    Mostly Sunny

Today 6 Jul Northern St. Lawrence

Partly sunny. Highs in the lower 80s. Northeast Winds around 10 Mph.

Tonight 6 Jul Northern St. Lawrence

Mostly cloudy until Midnight, then becoming partly cloudy. Lows in the lower 60s. East Winds around 10 Mph until Midnight, becoming light and variable.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Winthrop Temperature Statistics

July Temperature

Massena, Massena International-Richards Field (9.9 miles)

  • Lowest 4 July, 2026

    59 °F

  • Average July

    78.1 °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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