South Beloit Weather Forecast

    • -2
    • 32

    Snow Showers Likely

    • -3
    • 10

    Cold

    • 16
    • 24

    Mostly Cloudy

    • 8
    • 27

    Chance Snow

    • -3
    • 20

    Mostly Cloudy

    • 11
    • 21

    Mostly Cloudy

Today 3 Dec Winnebago

Mostly cloudy. A chance of snow and patchy freezing drizzle. Temperatures in the lower 30s. Northwest Winds 10 to 15 Mph. Chance of measurable precipitation 20 to 30 percent.

Tonight 3 Dec Winnebago

Partly cloudy in the evening then clearing. A chance of Flurries early in the evening. Turning sharply Colder. Lows around 2 below. Northwest Winds 5 to 10 Mph. Wind chill Values as low as 13 below after midnight.

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South Beloit Temperature Statistics

December Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 1 December, 2025

    5 °F

  • Average December

    20 °F

  • Highest 1 December, 2025

    28.4 °F

Climate (2020–Present)

Janesville-Rock County (8.7 miles)

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  • Average Low 2020–2025

    40.5 °F

  • Average 2020–2025

    48.8 °F

  • Average High 2020–2025

    60.3 °F
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