South Beloit Weather Forecast

    • 34
    • 46

    Slight Chance Rain Showers

    • 35
    • 52

    Partly Sunny

    • 21
    • 46

    Partly Sunny

    • 32
    • 43

    Chance Rain/Snow

    • 48
    • 64

    Chance Rain Showers

    • 43
    • 61

    Chance Rain Showers

Today 4 Apr Winnebago

Cloudy. Patchy fog late in the morning. Breezy. Near steady temperature in the upper 40s. West Winds 15 to 25 Mph. Gusts to 30 Mph.

Tonight 4 Apr Winnebago

Mostly cloudy and breezy. Lows in the lower 30s. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Beloit Temperature Statistics

April Temperature

Janesville-Rock County (8.7 miles)

  • Lowest 1 April, 2026

    33.8 °F

  • Average April

    41.4 °F

  • Highest 2 April, 2026

    66.2 °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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