Winthrop Weather Forecast

    • 70
    • 85

    Increasing Clouds

    • 69
    • 92

    Rain Showers Likely

    • 62
    • 84

    Mostly Sunny

    • 54
    • 81

    Slight Chance Thunderstorms

    • 56
    • 76

    Partly Sunny

    • 56
    • 78

    Chance Thunderstorms

    • 57
    • 79

    Chance Rain Showers

Today 13 Jul Northern St. Lawrence

Partly sunny. A slight chance of Showers this afternoon. Highs in the mid 80s. Southwest Winds 10 to 15 Mph. Chance of rain 20 percent.

Tonight 13 Jul Northern St. Lawrence

Mostly clear until Midnight, then becoming partly cloudy. Lows around 70. Southwest Winds 10 to 15 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 5 July, 2026

    52.6 °F

  • Average July

    73.3 °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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