South Beloit Weather Forecast

    • 52
    • 75

    Increasing Clouds

    • 54
    • 77

    Partly Sunny

    • 62
    • 79

    Slight Chance Thunderstorms

    • 61
    • 82

    Chance Thunderstorms

    • 59
    • 80

    Mostly Sunny

    • 59
    • 80

    Partly Sunny

Today 23 Aug Winnebago

Sunny in the Morning, then becoming partly cloudy. Highs in the mid 70s. Northwest Winds 5 to 10 Mph.

Tonight 23 Aug Winnebago

Clear. Lows in the mid 50s. Northwest Winds around 5 Mph.

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South Beloit Temperature Statistics

August Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 3 August, 2026

    53.6 °F

  • Average August

    69.1 °F

  • Highest 4 August, 2026

    84.2 °F

Climate (2021–2026)

Janesville-Rock County (8.7 miles)

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  • Average Low 2021–2026

    40.3 °F

  • Average 2021–2026

    48.7 °F

  • Average High 2021–2026

    60.3 °F
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