Grindstone Weather Forecast

    • 58
    • 75

    Partly Sunny

    • 61
    • 76

    Mostly Sunny

    • 64
    • 78

    Rain Showers

    • 58
    • 74

    Chance Thunderstorms

    • 57
    • 71

    Chance Rain Showers

    • 60
    • 74

    Partly Sunny

Today 20 Aug Jefferson

Partly sunny. Highs Ranging from the lower 70s on the tug hill to the mid 70s across the lower Elevations. Light west Winds.

Tonight 20 Aug Jefferson

Mainly clear with some patchy fog developing. Lows Ranging from the lower 50s across the tug hill to the mid 50s along the lake Ontario shore. Light Winds.

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Grindstone Temperature Statistics

August Temperature

Watertown, Watertown International Airport (20.5 miles)

  • Lowest 16 August, 2026

    47.6 °F

  • Average August

    70.2 °F

  • Highest 5 August, 2026

    87.7 °F

Climate (2021–2026)

Watertown, Watertown International Airport (20.5 miles)

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  • Average Low 2021–2026

    38.3 °F

  • Average 2021–2026

    48.3 °F

  • Average High 2021–2026

    57.6 °F
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