Mannsville Weather Forecast

    • 25
    • 36

    Chance Rain/Snow

    • 15
    • 32

    Snow Showers Likely

    • 24
    • 31

    Rain/Snow

    • 23
    • 38

    Rain/Snow Likely

    • 23
    • 31

    Chance Snow Showers

    • 32
    • 42

    Rain Showers Likely

Today 20 Dec Jefferson

Mostly sunny this Morning, then becoming mostly cloudy. Windy with Highs Ranging from the mid 30s inland to the upper 30s along the lake Ontario shore. Light Winds, becoming south 20 to 30 Mph.

Tonight 20 Dec Jefferson

Mostly cloudy with a 50 percent chance of rain and snow Showers. Very windy with Lows Ranging from around 20 on the tug hill to the mid 20s across the lower Elevations. South Winds 30 to 40 Mph, becoming southwest.

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Mannsville Temperature Statistics

December Temperature

Watertown, Watertown International Airport (19.3 miles)

  • Lowest 5 December, 2025

    -6 °F

  • Average December

    23.4 °F

  • Highest 17 December, 2025

    41 °F

Climate (2020–Present)

Watertown, Watertown International Airport (19.3 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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