South Beloit Weather Forecast

    • 43
    • 67

    Increasing Clouds

    • 51
    • 67

    Chance Thunderstorms

    • 48
    • 70

    Severe Tstms

    • 42
    • 61

    Mostly Cloudy

    • 39
    • 60

    Partly Sunny

    • 38
    • 59

    Mostly Cloudy

Today 25 Apr Winnebago

Partly cloudy late in the Morning, then becoming mostly sunny. Highs in the upper 60s. Northeast Winds 10 to 15 Mph.

Tonight 25 Apr Winnebago

Partly cloudy in the Evening, then becoming mostly cloudy. Lows in the lower 40s. Northeast Winds 10 to 15 Mph, becoming east 5 to 10 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Beloit Temperature Statistics

April Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 7 April, 2026

    23 °F

  • Average April

    47.9 °F

  • Highest 17 April, 2026

    78.8 °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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