South Beloit Weather Forecast

    • 55
    • 72

    Decreasing Clouds

    • 60
    • 78

    Chance Rain Showers

    • 73
    • 84

    Mostly Cloudy

    • 75
    • 92

    Partly Sunny

    • 74
    • 93

    Slight Chance Thunderstorms

    • 73
    • 94

    Mostly Sunny

Today 26 Jun Winnebago

Mostly cloudy. A slight chance of Showers in the late morning and afternoon. Highs in the lower 70s. East Winds 5 to 10 Mph. Chance of precipitation 20 percent.

Tonight 26 Jun Winnebago

Mostly clear. Lows in the mid 50s. Northeast Winds 5 to 10 Mph.

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South Beloit Temperature Statistics

June Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 3 June, 2026

    44.6 °F

  • Average June

    65 °F

  • Highest 4 June, 2026

    87.8 °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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