South Beloit Weather Forecast

    • 63
    • 88

    Rain Showers Likely

    • 63
    • 82

    Rain Showers

    • 61
    • 86

    Chance Rain Showers

    • 63
    • 85

    Slight Chance Thunderstorms

    • 66
    • 86

    Chance Thunderstorms

    • 67
    • 88

    Chance Thunderstorms

    • 69
    • 92

    Chance Thunderstorms

Today 4 Jun Winnebago

Partly cloudy. Highs in the upper 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 4 Jun Winnebago

Partly cloudy in the Evening, then becoming mostly cloudy. A slight chance of Showers after midnight. A chance of Showers and a slight chance of Thunderstorms late. Lows in the mid 60s. South Winds 10 to 15 Mph. Chance of precipitation 50 percent.

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South Beloit Temperature Statistics

June Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 2 June, 2026

    46.4 °F

  • Average June

    61.7 °F

  • Highest 2 June, 2026

    80.6 °F

Climate (2021–Present)

Janesville-Rock County (8.7 miles)

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  • Average Low 2021–2026

    40.4 °F

  • Average 2021–2026

    48.8 °F

  • Average High 2021–2026

    60.4 °F
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