Rock River Park Weather Forecast

    • 35
    • 38

    Rain

    • 33
    • 43

    Chance Rain

    • 37
    • 45

    Chance Rain

    • 11
    • 45

    Chance Rain/Snow

    • 9
    • 19

    Partly Sunny

    • 14
    • 26

    Mostly Cloudy

Today 25 Dec Jefferson

Mostly cloudy. Highs in the upper 30s. East Winds 10 to 15 Mph.

Tonight 25 Dec Jefferson

Cloudy. Slight chance of light rain late in the evening. Light rain after midnight. Lows in the mid 30s. Southeast Winds 5 to 15 Mph. Chance of rain 90 percent.

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Rock River Park Temperature Statistics

December Temperature

Watertown (17.4 miles)

  • Lowest 14 December, 2025

    -7.2 °F

  • Average December

    19.7 °F

  • Highest 23 December, 2025

    43.3 °F

Climate (2020–Present)

Watertown (17.4 miles)

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  • Average Low 2020–2025

    35.6 °F

  • Average 2020–2025

    45.4 °F

  • Average High 2020–2025

    54.5 °F
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