South Beloit Weather Forecast

    • 73
    • 90

    Chance Thunderstorms

    • 69
    • 90

    Chance Thunderstorms

    • 61
    • 84

    Mostly Sunny

    • 59
    • 83

    Mostly Sunny

    • 63
    • 86

    Chance Rain Showers

    • 64
    • 85

    Chance Rain Showers

Today 26 Jul Winnebago

Mostly cloudy. Patchy fog early in the morning. Highs around 90. South Winds 5 to 10 Mph. Heat index Values up to 101.

Tonight 26 Jul Winnebago

Partly cloudy. A chance of Showers and Thunderstorms after midnight. Humid with Lows in the lower 70s. South Winds 5 to 10 Mph. Chance of precipitation 30 percent. Heat index Values up to 100 early in the evening.

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South Beloit Temperature Statistics

July Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 22 July, 2026

    50 °F

  • Average July

    74.3 °F

  • Highest 14 July, 2026

    95 °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

    60.4 °F
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