Thousand Island Park Weather Forecast

    • 51
    • 75

    Mostly Sunny

    • 51
    • 76

    Partly Sunny

    • 54
    • 78

    Mostly Sunny

    • 56
    • 80

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

Today 14 Sep Jefferson

Some patchy fog Early, otherwise partly sunny this Morning, then becoming mostly sunny. Highs Ranging from around 70 on the tug hill to the mid 70s across the lower Elevations. Light Winds.

Tonight 14 Sep Jefferson

Mainly clear with some patchy fog developing overnight. Lows around 50. Light northeast Winds.

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Thousand Island Park Temperature Statistics

September Temperature

Watertown, Watertown International Airport (19.9 miles)

  • Lowest 9 September, 2025

    39.9 °F

  • Average September

    61.3 °F

  • Highest 4 September, 2025

    80.1 °F

Climate (2020–Present)

Watertown, Watertown International Airport (19.9 miles)

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  • Average Low 2020–2025

    38.9 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    57.7 °F
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