Rock River Park Weather Forecast

    • -7
    • 30

    Becoming Sunny

    • 2
    • 13

    Partly Sunny

    • 15
    • 24

    Chance Snow

    • 6
    • 25

    Chance Snow

    • -3
    • 19

    Chance Snow

    • 10
    • 21

    Chance Snow

    • 20
    • 30

    Chance Snow

Today 3 Dec Jefferson

Cloudy. Scattered Flurries through the day. Highs around 30. Northwest Winds 10 to 15 Mph.

Tonight 3 Dec Jefferson

Bitterly cold. Much Colder. Mostly cloudy in the evening then clearing. Lows around 6 below. Northwest Winds 5 to 15 Mph. Wind chill Readings 10 below to 20 below zero.

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Rock River Park Temperature Statistics

December Temperature

Watertown (17.4 miles)

  • Lowest 1 December, 2025

    1.4 °F

  • Average December

    15 °F

  • Highest 1 December, 2025

    24.6 °F

Climate (2020–Present)

Watertown (17.4 miles)

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  • Average Low 2020–2025

    35.8 °F

  • Average 2020–2025

    45.6 °F

  • Average High 2020–2025

    54.6 °F
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