South Beloit Weather Forecast

    • 37
    • 40

    Rain Likely

    • 34
    • 46

    Mostly Cloudy

    • 40
    • 47

    Mostly Cloudy

    • 14
    • 46

    Blustery

    • 10
    • 21

    Partly Sunny

Today 25 Dec Winnebago

Cloudy. Near steady temperature in the upper 30s. East Winds 10 to 15 Mph.

Tonight 25 Dec Winnebago

Cloudy. Scattered Showers late in the evening. Numerous Showers after midnight. Patchy fog after midnight. Areas of fog late. Lows in the upper 30s. Southeast Winds 10 to 15 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Beloit Temperature Statistics

December Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 14 December, 2025

    -7.6 °F

  • Average December

    20.8 °F

  • Highest 18 December, 2025

    46.4 °F

Climate (2020–Present)

Janesville-Rock County (8.7 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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