South Beloit Weather Forecast

    • 70
    • 92

    Thunderstorms Likely

    • 57
    • 82

    Chance Rain Showers

    • 61
    • 82

    Partly Sunny

    • 66
    • 87

    Chance Thunderstorms

    • 64
    • 85

    Chance Thunderstorms

    • 64
    • 86

    Chance Thunderstorms

Today 5 Jul Winnebago

Partly cloudy late morning through mid Afternoon, then becoming mostly cloudy. A chance of Showers and Thunderstorms late in the afternoon. Breezy. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of precipitation 40 percent. Heat index Values up to 100.

Tonight 5 Jul Winnebago

Mostly cloudy. Showers likely in the evening. A chance of Thunderstorms. A chance of Showers after midnight. Lows around 70. Southwest Winds 10 to 15 Mph. Gusts up to 25 Mph in the evening. Chance of precipitation 70 percent.

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South Beloit Temperature Statistics

July Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 1 July, 2025

    60.8 °F
  • Average July

    72.2 °F
  • Highest 3 July, 2025

    89.6 °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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