South Beloit Weather Forecast

    • 68
    • 85

    Rain Showers Likely

    • 57
    • 73

    Rain Showers

    • 58
    • 78

    Partly Sunny

    • 63
    • 80

    Slight Chance Thunderstorms

    • 63
    • 80

    Chance Rain Showers

    • 66
    • 82

    Chance Thunderstorms

    • 64
    • 82

    Chance Thunderstorms

Today 4 Aug Winnebago

Mostly cloudy. Temperatures in the mid 80s. Southwest Winds around 10 Mph.

Tonight 4 Aug Winnebago

Mostly cloudy. A chance of Showers in the evening. A chance of Thunderstorms. Showers likely after midnight. Lows in the upper 60s. West Winds around 5 Mph. Chance of precipitation 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Beloit Temperature Statistics

August Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 2 August, 2026

    60.8 °F

  • Average August

    66.3 °F

  • Highest 2 August, 2026

    80.6 °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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