Grindstone Weather Forecast

    • 6
    • 32

    Partly Sunny

    • 15
    • 17

    Snow

    • 12
    • 21

    Partly Sunny

    • 27
    • 32

    Rain/Snow

    • 14
    • 37

    Snow Showers Likely

    • 15
    • 20

    Chance Snow Showers

    • 10
    • 25

    Chance Snow Showers

Today 25 Dec Jefferson

Cloudy Early, then becoming partly sunny. Temperatures falling to between 15 and 20 inland and to the lower 20s along the lake Ontario shore. North Winds 10 to 20 Mph.

Tonight 25 Dec Jefferson

Mostly cloudy. Lows zero to 5 above. North Winds 10 to 15 Mph, becoming light.

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Grindstone Temperature Statistics

December Temperature

Watertown, Watertown International Airport (20.5 miles)

  • Lowest 5 December, 2025

    -6 °F

  • Average December

    26 °F

  • Highest 19 December, 2025

    55 °F

Climate (2020–Present)

Watertown, Watertown International Airport (20.5 miles)

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  • Average Low 2020–2025

    38.8 °F

  • Average 2020–2025

    48.6 °F

  • Average High 2020–2025

    57.6 °F
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