South Beloit Weather Forecast

    • 56
    • 75

    Rain Showers Likely

    • 55
    • 77

    Increasing Clouds

    • 54
    • 71

    Rain Showers Likely

    • 50
    • 73

    Partly Sunny

    • 55
    • 76

    Rain Showers Likely

    • 53
    • 75

    Rain Showers Likely

    • 54
    • 76

    Slight Chance Thunderstorms

Today 19 Jun Winnebago

Partly cloudy. Temperatures in the mid 70s. West Winds around 10 Mph.

Tonight 19 Jun Winnebago

Mostly cloudy early in the evening then clearing. Showers likely early in the evening. A slight chance of Thunderstorms early in the evening. A chance of Showers late in the evening. Lows in the mid 50s. Southwest Winds 5 to 10 Mph. Chance of precipitation 60 percent.

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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

    66.4 °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

    60.4 °F
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