South Beloit Weather Forecast

    • 60
    • 82

    Chance Rain Showers

    • 56
    • 79

    Mostly Sunny

    • 57
    • 80

    Mostly Sunny

    • 64
    • 80

    Chance Rain Showers

    • 68
    • 84

    Chance Rain Showers

    • 64
    • 84

    Slight Chance Thunderstorms

Today 26 Aug Winnebago

Partly cloudy. A chance of Showers with a slight chance of Thunderstorms early in the morning. Highs in the lower 80s. West Winds 10 to 15 Mph. Chance of precipitation 30 percent.

Tonight 26 Aug Winnebago

Mostly cloudy. A slight chance of Showers after Midnight, then a chance of Showers and a slight chance of Thunderstorms late. Near steady temperature in the mid 60s. South Winds 5 to 10 Mph. Chance of precipitation 30 percent.

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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

    68.4 °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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