South Beloit Weather Forecast

    • 67
    • 78

    Chance Rain Showers

    • 70
    • 86

    Chance Rain Showers

    • 72
    • 88

    Slight Chance Thunderstorms

    • 71
    • 89

    Chance Thunderstorms

    • 69
    • 89

    Slight Chance Rain Showers

    • 68
    • 87

    Chance Rain Showers

Today 29 Aug Winnebago

Mostly cloudy. A chance of Showers in the afternoon. Highs in the upper 70s. South Winds 5 to 10 Mph, increasing to 10 to 15 Mph in the afternoon. Chance of precipitation 30 percent.

Tonight 29 Aug Winnebago

Partly cloudy. Near steady temperature in the lower 60s. South Winds around 5 Mph.

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South Beloit Temperature Statistics

August Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 24 August, 2026

    50 °F

  • Average August

    67.9 °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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