South Beloit Weather Forecast

    • 31
    • 43

    Snow Likely

    • 19
    • 33

    Snow Likely

    • 22
    • 30

    Partly Sunny

    • 30
    • 40

    Mostly Cloudy

    • 27
    • 44

    Chance Rain/Snow

    • 15
    • 31

    Slight Chance Snow Showers

    • 20
    • 28

    Mostly Cloudy

Today 9 Jan Winnebago

Mostly cloudy late in the Morning, then becoming partly cloudy. Breezy. Near steady temperature around 40. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph, Diminishing to 10 to 15 Mph in the afternoon.

Tonight 9 Jan Winnebago

Mostly cloudy. A chance of rain and a slight chance of snow after midnight. Snow and rain likely late. Little or no snow accumulation. Lows in the lower 30s. Northeast Winds around 5 Mph, becoming southwest after midnight. Chance of precipitation 70 percent.

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South Beloit Temperature Statistics

January Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 1 January, 2026

    8.6 °F

  • Average January

    25.9 °F

  • Highest 6 January, 2026

    39.2 °F

Climate (2021–Present)

Janesville-Rock County (8.7 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.2 °F
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