South Beloit Weather Forecast

    • 45
    • 74

    Mostly Cloudy

    • 41
    • 63

    Partly Sunny

    • 45
    • 62

    Mostly Cloudy

    • 48
    • 62

    Rain Showers Likely

    • 51
    • 71

    Mostly Cloudy

    • 53
    • 77

    Partly Sunny

    • 57
    • 81

    Partly Sunny

Today 19 May Winnebago

Mostly cloudy. Temperatures in the upper 60s. Northwest Winds 15 to 20 Mph with Gusts up to 25 Mph.

Tonight 19 May Winnebago

Mostly cloudy. Lows in the mid 40s. Northwest Winds 10 to 15 Mph.

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  • Temperature Real-Time

South Beloit Temperature Statistics

May Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 2 May, 2026

    30.2 °F

  • Average May

    52.3 °F

  • Highest 17 May, 2026

    84.2 °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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