West Side Park Weather Forecast

    • 7
    • 44

    Snow Showers Likely

    • 17
    • 20

    Increasing Clouds

    • 10
    • 37

    Partly Sunny

    • 15
    • 24

    Partly Sunny

    • 31
    • 36

    Mostly Cloudy

    • 29
    • 42

    Mostly Cloudy

    • 35
    • 42

    Mostly Cloudy

Today 18 Dec Rock

Cloudy. West Winds 15 to 20 Mph with Gusts to around 35 Mph.

Tonight 18 Dec Rock

Much Colder. Breezy, cloudy. A 50 percent chance of light snow until early morning. Lows around 7. West Winds 15 to 25 Mph.

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  • Temperature Real-Time

West Side Park Temperature Statistics

December Temperature

Janesville-Rock County (17.4 miles)

  • Lowest 14 December, 2025

    -7.6 °F

  • Average December

    17.3 °F

  • Highest 10 December, 2025

    37.4 °F

Climate (2020–Present)

Janesville-Rock County (17.4 miles)

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  • Average Low 2020–2025

    40.4 °F

  • Average 2020–2025

    48.7 °F

  • Average High 2020–2025

    60.2 °F
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