Happy Hollow Park Weather Forecast

    • 23
    • 43

    Chance Rain

    • 30
    • 36

    Mostly Cloudy

    • 28
    • 50

    Mostly Cloudy

    • 17
    • 36

    Mostly Cloudy

    • 21
    • 30

    Cloudy

    • 23
    • 36

    Chance Wintry Mix

Today 31 Jan Rock

Colder. Areas of dense fog in the morning. Patchy fog in the late morning and early afternoon. Cloudy with a 50 percent chance of light rain in the Morning, then partly sunny in the afternoon. Highs in the lower 40s. Northeast Winds 10 to 20 Mph.

Tonight 31 Jan Rock

Colder. Partly cloudy. Lows in the lower 20s. Northeast Winds 10 to 15 Mph.

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Happy Hollow Park Temperature Statistics

January Temperature

Janesville-Rock County (1.2 miles)

  • Lowest 21 January, 2025

    -13 °F

  • Average January

    17.1 °F

  • Highest 17 January, 2025

    53.6 °F

Climate (2020–Present)

Janesville-Rock County (1.2 miles)

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  • Average Low 2020–2025

    40.6 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.2 °F
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